Petter Reinholdtsen: The life and death of a laptop battery

+#!/bin/sh +# Inspired by +# http://www.ifweassume.com/2013/08/the-de-evolution-of-my-laptop-battery.html +# See also +# http://blog.sleeplessbeastie.eu/2013/01/02/debian-how-to-monitor-battery-capacity/ +logfile=/var/log/hjemmenett-battery-status.log + +files="manufacturer model_name technology serial_number \ + energy_full energy_full_design energy_now cycle_count status" + +if [ ! -e "$logfile" ] ; then + ( + printf "timestamp," + for f in $files; do + printf "%s," $f + done + echo + ) > "$logfile" +fi + +log_battery() { + # Print complete message in one echo call, to avoid race condition + # when several log processes run in parallell. + msg=$(printf "%s," $(date +%s); \ + for f in $files; do \ + printf "%s," $(cat $f); \ + done) + echo "$msg" +} + +cd /sys/class/power_supply + +for bat in BAT*; do + (cd $bat && log_battery >> "$logfile") +done +

+timestamp,manufacturer,model_name,technology,serial_number,energy_full,energy_full_design,energy_now,cycle_count,status, +1376591133,LGC,45N1025,Li-ion,974,62800000,62160000,39050000,0,Discharging, +[...] +1443090528,LGC,45N1025,Li-ion,974,4900000,62160000,4900000,0,Full, +1443090601,LGC,45N1025,Li-ion,974,4900000,62160000,4900000,0,Full, +

Book cover for the Free Culture book finally done @@ -111,7 +254,7 @@ proof readers a chance to complete their work.

August (2)

September (1)

September (2)

@@ -321,7 +464,7 @@ proof readers a chance to complete their work.

@@ -333,7 +476,7 @@ proof readers a chance to complete their work.

diff --git a/blog/data/2015-09-24-laptop-battery.txt b/blog/data/2015-09-24-laptop-battery.txt index eb3b4473b4..addb0d97e1 100644 --- a/blog/data/2015-09-24-laptop-battery.txt +++ b/blog/data/2015-09-24-laptop-battery.txt @@ -1,6 +1,6 @@ Title: The life and death of a laptop battery Tags: english, debian -Date: 2015-09-24 20:00 +Date: 2015-09-24 16:00

When I get a new laptop, the battery life time at the start is OK. But this do not last. The last few laptops gave me a feeling that diff --git a/blog/index.html b/blog/index.html index 2a019b5282..476598e320 100644 --- a/blog/index.html +++ b/blog/index.html @@ -19,6 +19,143 @@ +

The life and death of a laptop battery

24th September 2015

When I get a new laptop, the battery life time at the start is OK. +But this do not last. The last few laptops gave me a feeling that +within a year, the life time is just a fraction of what it used to be, +and it slowly become painful to use the laptop without power connected +all the time. Because of this, when I got a new Thinkpad X230 laptop +about two years ago, I decided to monitor its battery state to have +more hard facts when the battery started to fail.

+ +

First I tried to find a sensible Debian package to record the +battery status, assuming that this must be a problem already handled +by someone else. I found +battery-stats, +which collects statistics from the battery, but it was completely +broken. I sent a few suggestions to the maintainer, but decided to +write my own collector as a shell script while I waited for feedback +from him. Via +a +blog post about the battery development on a MacBook Air I also +discovered +batlog, not +available in Debian.

+ +

I started my collector 2013-07-15, and it has been collecting +battery stats ever since. Now my +/var/log/hjemmenett-battery-status.log file contain around 115,000 +measurements, from the time the battery was working great until now, +when it is unable to charge above 7% of original capasity. My +colletor shell script is quite simple and look like this:

+ +

+#!/bin/sh
+# Inspired by
+# http://www.ifweassume.com/2013/08/the-de-evolution-of-my-laptop-battery.html
+# See also
+# http://blog.sleeplessbeastie.eu/2013/01/02/debian-how-to-monitor-battery-capacity/
+logfile=/var/log/hjemmenett-battery-status.log
+
+files="manufacturer model_name technology serial_number \
+    energy_full energy_full_design energy_now cycle_count status"
+
+if [ ! -e "$logfile" ] ; then
+    (
+	printf "timestamp,"
+	for f in $files; do
+	    printf "%s," $f
+	done
+	echo
+    ) > "$logfile"
+fi
+
+log_battery() {
+    # Print complete message in one echo call, to avoid race condition
+    # when several log processes run in parallell.
+    msg=$(printf "%s," $(date +%s); \
+	for f in $files; do \
+	    printf "%s," $(cat $f); \
+	done)
+    echo "$msg"
+}
+
+cd /sys/class/power_supply
+
+for bat in BAT*; do
+    (cd $bat && log_battery >> "$logfile")
+done
+

+ +

The script is called when the power management system detect a +change in the power status (power plug in or out), and when going into +and out of hibernation and suspend. In addition, it collect a value +every 10 minutes. This make it possible for me know when the battery +is discharging, charging and how the maximum charge change over time. +The code for the Debian package +is now +available on github.

+ +

The collected log file look like this:

+ +

+timestamp,manufacturer,model_name,technology,serial_number,energy_full,energy_full_design,energy_now,cycle_count,status,
+1376591133,LGC,45N1025,Li-ion,974,62800000,62160000,39050000,0,Discharging,
+[...]
+1443090528,LGC,45N1025,Li-ion,974,4900000,62160000,4900000,0,Full,
+1443090601,LGC,45N1025,Li-ion,974,4900000,62160000,4900000,0,Full,
+

+ +

I wrote a small script to create a graph of the charge development +over time. This graph depicted above show the slow death of mylaptop +battery.

+ +

But why is this happening? Why are my laptop batteries always +dying in a year or two, while the batteries of space probes and +satellites keep working year after year. If we are to believe +Battery +University, the cause is me charging the battery whenever I have a +chance, and the fix is to not charge the Lithium-ion batteries to 100% +all the time, but to stay below 90% of full charge most of the time. +I've been told that the Tesla electric cars +limit +the charge of their batteries to 80%, with the option to charge to +100% when preparing for a longer trip (not that I would want a car +like Tesla where rights to privacy is abandoned, but that is another +story), which I guess is the option we should have for laptops on +Linux too.

+ +

Is there a good and generic way with Linux to tell the battery to +stop charging at 80%, unless requested to charge to 100% once in +preparation for a longer trip? I found +one +recipe on askubuntu for Ubuntu to limit charging on Thinkpad to +80%, but could not get it to work (kernel module refused to +load).

+ +

I wonder why the battery capacity was reported to be more than 100% +at the start. I also wonder why the "full capacity" increases some +times, and if it is possible to repeat the process to get the battery +back to design capacity. And I wonder if the discharge and charge +speed change over time, or if this stay the same. I did not yet try +to write a tool to calculate the derivative values of the battery +level, but suspect some interesting insights might be learned from +those.

+ + + Tags: debian, english. + + +

Book cover for the Free Culture book finally done

3rd September 2015

@@ -744,132 +881,6 @@ easier to publish NUUG videos on Frikanalen.

Hvem fÃ¸rer Medietilsynet tilsyn med?

28th June 2015

I en global verden med eierskap pÃ¥ tvers, trengs det informasjon om -hvem som har kontrollen i selskaper og bedrifter. Og for Ã¥ fÃ¥ tilgang -til slik informasjon for alle som Ã¸nsker Ã¥ analysere eierskap, holder -med ikke med nasjonale databaser over eierskap, det mÃ¥ globale -samledatabaser med Ã¥pne data til. Heldigvis finnes det en -internasjonal bevegelse for Ã¥ gjÃ¸re selskapsinformasjon for alle land -offentlig tilgjengelig. En slik database heter -OpenCorporates, der -informasjonen er gratis tilgjengelig med en "del pÃ¥ samme -vilkÃ¥r"-lisens. De samler inn selskapsinformasjon, eierskap, -konsesjonstildelinger og lignende. De manglet ganske mye for Norge, -da bruksvilkÃ¥rene til Norsk offentlig informasjon i stor grad -blokkerer OpenCorporates fra Ã¥ samle den inn.

- -

Men jeg er jo involvert i -Frikanalen, som har -TV-konsesjon, og tenkte det kunne vÃ¦re fint om informasjon om alle -mediakonsesjoner var tilgjengelig i OpenCorporates, sÃ¥ jeg sendte -avgÃ¥rde fÃ¸lgende spÃ¸rsmÃ¥l til Medietilsynet 2015-06-22:

- -

-
Hei. Finnes det en oversikt over enhetene som Mediatilsynet fÃ¸rer -tilsyn med som Ã¥pne data? Jeg lette etter den pÃ¥ -<URL:http://data.norge.no/> og -<URL:http://hotell.difi.no/> uten Ã¥ -finne noe der, og fant heller ikke noe under -<URL:http://www.medietilsynet.no/>.
- -
Jeg tenker pÃ¥ alle som har fÃ¥tt kringkastingskonsesjon og alle som -er omtalt under -<URL:http://www.medietilsynet.no/mediebildet/>.
- -
Jeg skulle gjerne hatt dette maskinlesbart, og inkludert -organisasjonsnummer og hva slags forhold mediatilsynet har til -organisasjonene. Tanken er Ã¥ importere det i -<URL:https://opencorporates.com/> for analyse, sÃ¥ det bÃ¸r ikke ha -bruksbegresninger som gjÃ¸r dette umulig.
-

- -

To dager senere fikk jeg svar, med de datasettene de hadde -tilgjengelig. Svaret fra Hanne Sekkelsten hos Medietilsynet var -informativt og imÃ¸tekommende.

- -

-
Vi viser til din e-post av 22. juni, der du ber om Ã¥ fÃ¥ tilsendt oversikter -over aktÃ¸rer Medietilsynet fÃ¸rer tilsyn med.
- -
Medietilsynet fÃ¸rer tilsyn med kringkastere og audiovisuelle -bestillingstjenester som omfattes av kringkastingsloven, og med -eierskap i aviser, fjernsyn radio og elektroniske medier etter -medieeierskapsloven. I tillegg vil Medietilsynet etter at -beskyttelsesloven trer i kraft fra 1. juli ha tilsyn med en rekke nye -aktÃ¸rer. NÃ¦rmere informasjon om den nye loven finnes pÃ¥ Medietilsynets -nettsted, her: -http://www.medietilsynet.no/mediebransjen/bildeprogramloven/ -. Vi har ikke utarbeidet oversikter over alle aktÃ¸rene, men vi sender -deg her de listene vi har utarbeidet, hentet fra vÃ¥re databaser. Vi -har dessverre ikke ferdige rapporter som inneholder -organisasjonsnummer. Dersom du Ã¸nsker flere opplysninger ber vi om at -du tar kontakt med oss slik at vi kan finne ut av hvilke opplysninger -du trenger, og hvilke vi kan fremskaffe.
- -
Vedlagt fÃ¸lger: - -
- -
Konsesjoner - lokalradio FM pr. 31.12.2014 [PDF (original)]
- -
Konsesjoner - lokalfjernsyn i det digitale bakkenettet for fjernsyn, pr. mars 2015 [DOCX (original), -PDF]
- -
Konsesjoner - DAB-radio, status mars 2015 [XPS (original), -PDF]
- -
Registreringspliktige kringkastere - status mars 2015: [XPS (original), PDF] - -
-
Kabelsendt fjernsyn -
Satellittsendt fjernsyn -
Nett-tv -
Kabelsendt radio -
Satellittsendt radio -
Nett-radio -
-
- -
Vi mÃ¥ ta forbehold om at det kan vÃ¦re enkelte feil i oversiktene -siden disse ikke er oppdaterte pr. dags dato. Vi vil foreta nye -oppdateringer i august.
- -
Med hilsen
- -
Hanne Nistad Sekkelsten -
SeniorrÃ¥dgiver | Senior Legal Adviser -
Medietilsynet | Norwegian Media Authority -
A: Nygata 4, NO-1607 Fredrikstad -
T: [telefonnummer fjernet] -
E: [adresse fjernet] | W: www.medietilsynet.no -
-

- -

Desverre er formatene for ustrukturerte til maskinell behandling og -mangler endel informasjon, men det er gode oversikter over hvem -Medietilsynet fÃ¸rer tilsyn med. Filene er pÃ¥ formatene PDF, XPS -(XML-basert PDF-lignende format fra Microsoft) og DOCX, sÃ¥ det vil -vÃ¦re en stor jobb Ã¥ strukturere informasjonen pÃ¥ en mÃ¥te som kan -importeres i OpenCorporates. Svaret er ikke i trÃ¥d med -Forskrift -om IT-standarder i offentlig forvaltning som sier epostvedlegg -skal sendes som PDF, sÃ¥ jeg har gjorde PDF-utgaver av XPS og -DOCX-utgavene tilgjengelig for Ã¥ gjÃ¸re det enklere for alle Ã¥ se -innholdet.

- - - Tags: norsk, offentlig innsyn. - - -

@@ -897,7 +908,7 @@ innholdet.

August (2)

September (1)

September (2)

@@ -1107,7 +1118,7 @@ innholdet.

@@ -1119,7 +1130,7 @@ innholdet.

diff --git a/blog/index.rss b/blog/index.rss index 477f484f67..e9e3a29be8 100644 --- a/blog/index.rss +++ b/blog/index.rss @@ -6,6 +6,137 @@ http://people.skolelinux.org/pere/blog/ + + The life and death of a laptop battery + http://people.skolelinux.org/pere/blog/The_life_and_death_of_a_laptop_battery.html + http://people.skolelinux.org/pere/blog/The_life_and_death_of_a_laptop_battery.html + Thu, 24 Sep 2015 16:00:00 +0200 + When I get a new laptop, the battery life time at the start is OK. +But this do not last. The last few laptops gave me a feeling that +within a year, the life time is just a fraction of what it used to be, +and it slowly become painful to use the laptop without power connected +all the time. Because of this, when I got a new Thinkpad X230 laptop +about two years ago, I decided to monitor its battery state to have +more hard facts when the battery started to fail. + +<img src="http://people.skolelinux.org/pere/blog/images/2015-09-24-laptop-battery-graph.png"/> + +First I tried to find a sensible Debian package to record the +battery status, assuming that this must be a problem already handled +by someone else. I found +<a href="https://tracker.debian.org/pkg/battery-stats">battery-stats</a>, +which collects statistics from the battery, but it was completely +broken. I sent a few suggestions to the maintainer, but decided to +write my own collector as a shell script while I waited for feedback +from him. Via +<a href="http://www.ifweassume.com/2013/08/the-de-evolution-of-my-laptop-battery.html">a +blog post about the battery development on a MacBook Air</a> I also +discovered +<a href="https://github.com/jradavenport/batlog.git">batlog</a>, not +available in Debian. + +I started my collector 2013-07-15, and it has been collecting +battery stats ever since. Now my +/var/log/hjemmenett-battery-status.log file contain around 115,000 +measurements, from the time the battery was working great until now, +when it is unable to charge above 7% of original capasity. My +colletor shell script is quite simple and look like this: + +<pre> +#!/bin/sh +# Inspired by +# http://www.ifweassume.com/2013/08/the-de-evolution-of-my-laptop-battery.html +# See also +# http://blog.sleeplessbeastie.eu/2013/01/02/debian-how-to-monitor-battery-capacity/ +logfile=/var/log/hjemmenett-battery-status.log + +files="manufacturer model_name technology serial_number \ + energy_full energy_full_design energy_now cycle_count status" + +if [ ! -e "$logfile" ] ; then + ( + printf "timestamp," + for f in $files; do + printf "%s," $f + done + echo + ) > "$logfile" +fi + +log_battery() { + # Print complete message in one echo call, to avoid race condition + # when several log processes run in parallell. + msg=$(printf "%s," $(date +%s); \ + for f in $files; do \ + printf "%s," $(cat $f); \ + done) + echo "$msg" +} + +cd /sys/class/power_supply + +for bat in BAT*; do + (cd $bat && log_battery >> "$logfile") +done +</pre> + +The script is called when the power management system detect a +change in the power status (power plug in or out), and when going into +and out of hibernation and suspend. In addition, it collect a value +every 10 minutes. This make it possible for me know when the battery +is discharging, charging and how the maximum charge change over time. +The code for the Debian package +<a href="https://github.com/petterreinholdtsen/battery-status">is now +available on github</a>. + +The collected log file look like this: + +<pre> +timestamp,manufacturer,model_name,technology,serial_number,energy_full,energy_full_design,energy_now,cycle_count,status, +1376591133,LGC,45N1025,Li-ion,974,62800000,62160000,39050000,0,Discharging, +[...] +1443090528,LGC,45N1025,Li-ion,974,4900000,62160000,4900000,0,Full, +1443090601,LGC,45N1025,Li-ion,974,4900000,62160000,4900000,0,Full, +</pre> + +I wrote a small script to create a graph of the charge development +over time. This graph depicted above show the slow death of mylaptop +battery. + +But why is this happening? Why are my laptop batteries always +dying in a year or two, while the batteries of space probes and +satellites keep working year after year. If we are to believe +<a href="http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries">Battery +University</a>, the cause is me charging the battery whenever I have a +chance, and the fix is to not charge the Lithium-ion batteries to 100% +all the time, but to stay below 90% of full charge most of the time. +I've been told that the Tesla electric cars +<a href="http://my.teslamotors.com/de_CH/forum/forums/battery-charge-limit">limit +the charge of their batteries to 80%</a>, with the option to charge to +100% when preparing for a longer trip (not that I would want a car +like Tesla where rights to privacy is abandoned, but that is another +story), which I guess is the option we should have for laptops on +Linux too. + +Is there a good and generic way with Linux to tell the battery to +stop charging at 80%, unless requested to charge to 100% once in +preparation for a longer trip? I found +<a href="http://askubuntu.com/questions/34452/how-can-i-limit-battery-charging-to-80-capacity">one +recipe on askubuntu for Ubuntu to limit charging on Thinkpad to +80%</a>, but could not get it to work (kernel module refused to +load). + +I wonder why the battery capacity was reported to be more than 100% +at the start. I also wonder why the "full capacity" increases some +times, and if it is possible to repeat the process to get the battery +back to design capacity. And I wonder if the discharge and charge +speed change over time, or if this stay the same. I did not yet try +to write a tool to calculate the derivative values of the battery +level, but suspect some interesting insights might be learned from +those. + + + Book cover for the Free Culture book finally done http://people.skolelinux.org/pere/blog/Book_cover_for_the_Free_Culture_book_finally_done.html @@ -677,125 +808,5 @@ easier to publish NUUG videos on Frikanalen. - - Hvem fÃ¸rer Medietilsynet tilsyn med? - http://people.skolelinux.org/pere/blog/Hvem_f_rer_Medietilsynet_tilsyn_med_.html - http://people.skolelinux.org/pere/blog/Hvem_f_rer_Medietilsynet_tilsyn_med_.html - Sun, 28 Jun 2015 23:20:00 +0200 - I en global verden med eierskap pÃ¥ tvers, trengs det informasjon om -hvem som har kontrollen i selskaper og bedrifter. Og for Ã¥ fÃ¥ tilgang -til slik informasjon for alle som Ã¸nsker Ã¥ analysere eierskap, holder -med ikke med nasjonale databaser over eierskap, det mÃ¥ globale -samledatabaser med Ã¥pne data til. Heldigvis finnes det en -internasjonal bevegelse for Ã¥ gjÃ¸re selskapsinformasjon for alle land -offentlig tilgjengelig. En slik database heter -<a href="http://opencorporates.com">OpenCorporates</a>, der -informasjonen er gratis tilgjengelig med en "del pÃ¥ samme -vilkÃ¥r"-lisens. De samler inn selskapsinformasjon, eierskap, -konsesjonstildelinger og lignende. De manglet ganske mye for Norge, -da bruksvilkÃ¥rene til Norsk offentlig informasjon i stor grad -blokkerer OpenCorporates fra Ã¥ samle den inn. - -Men jeg er jo involvert i -<a href="http://www.frikanalen.no/">Frikanalen</a>, som har -TV-konsesjon, og tenkte det kunne vÃ¦re fint om informasjon om alle -mediakonsesjoner var tilgjengelig i OpenCorporates, sÃ¥ jeg sendte -avgÃ¥rde fÃ¸lgende spÃ¸rsmÃ¥l til Medietilsynet 2015-06-22: - -<blockquote> -Hei. Finnes det en oversikt over enhetene som Mediatilsynet fÃ¸rer -tilsyn med som Ã¥pne data? Jeg lette etter den pÃ¥ -<URL:<a href="http://data.norge.no/">http://data.norge.no/</a>> og -<URL:<a href="http://hotell.difi.no/">http://hotell.difi.no/</a>> uten Ã¥ -finne noe der, og fant heller ikke noe under -<URL:<a href="http://www.medietilsynet.no/">http://www.medietilsynet.no/</a>>. - -Jeg tenker pÃ¥ alle som har fÃ¥tt kringkastingskonsesjon og alle som -er omtalt under -<URL:<a href="http://www.medietilsynet.no/mediebildet/">http://www.medietilsynet.no/mediebildet/</a>>. - -Jeg skulle gjerne hatt dette maskinlesbart, og inkludert -organisasjonsnummer og hva slags forhold mediatilsynet har til -organisasjonene. Tanken er Ã¥ importere det i -<URL:<a href="https://opencorporates.com/">https://opencorporates.com/</a>> for analyse, sÃ¥ det bÃ¸r ikke ha -bruksbegresninger som gjÃ¸r dette umulig. -</blockquote> - -To dager senere fikk jeg svar, med de datasettene de hadde -tilgjengelig. Svaret fra Hanne Sekkelsten hos Medietilsynet var -informativt og imÃ¸tekommende. - -<blockquote> -Vi viser til din e-post av 22. juni, der du ber om Ã¥ fÃ¥ tilsendt oversikter -over aktÃ¸rer Medietilsynet fÃ¸rer tilsyn med. - -Medietilsynet fÃ¸rer tilsyn med kringkastere og audiovisuelle -bestillingstjenester som omfattes av kringkastingsloven, og med -eierskap i aviser, fjernsyn radio og elektroniske medier etter -medieeierskapsloven. I tillegg vil Medietilsynet etter at -beskyttelsesloven trer i kraft fra 1. juli ha tilsyn med en rekke nye -aktÃ¸rer. NÃ¦rmere informasjon om den nye loven finnes pÃ¥ Medietilsynets -nettsted, her: -<a href="http://www.medietilsynet.no/mediebransjen/bildeprogramloven/">http://www.medietilsynet.no/mediebransjen/bildeprogramloven/</a> -. Vi har ikke utarbeidet oversikter over alle aktÃ¸rene, men vi sender -deg her de listene vi har utarbeidet, hentet fra vÃ¥re databaser. Vi -har dessverre ikke ferdige rapporter som inneholder -organisasjonsnummer. Dersom du Ã¸nsker flere opplysninger ber vi om at -du tar kontakt med oss slik at vi kan finne ut av hvilke opplysninger -du trenger, og hvilke vi kan fremskaffe. - -Vedlagt fÃ¸lger: - -<ul> - - <li>Konsesjoner - lokalradio FM pr. 31.12.2014 [<a href="http://people.skolelinux.org/pere/blog/images/2015-06-28-medietilsynsdata/Konsesjoner_lokalradio_fm_felles_31.12.2014.pdf">PDF (original)</a>]</li> - - <li>Konsesjoner - lokalfjernsyn i det digitale bakkenettet for fjernsyn, pr. mars 2015 [<a href="http://people.skolelinux.org/pere/blog/images/2015-06-28-medietilsynsdata/Lokalfjernsyn_DTT_konsesjoner_mars_2015.docx">DOCX (original)</a>, -<a href="http://people.skolelinux.org/pere/blog/images/2015-06-28-medietilsynsdata/Lokalfjernsyn_DTT_konsesjoner_mars_2015.pdf">PDF</a>]</li> - - <li>Konsesjoner - DAB-radio, status mars 2015 [<a href="http://people.skolelinux.org/pere/blog/images/2015-06-28-medietilsynsdata/Konsesjonaernummer_DAB.xps">XPS (original)</a>, -<a href="http://people.skolelinux.org/pere/blog/images/2015-06-28-medietilsynsdata/Konsesjonaernummer_DAB.pdf">PDF</a>]</li> - - <li>Registreringspliktige kringkastere - status mars 2015: [<a href="http://people.skolelinux.org/pere/blog/images/2015-06-28-medietilsynsdata/Registreringspliktige_kringkastere_register_-_aktive.xps">XPS (original)</a>, <a href="http://people.skolelinux.org/pere/blog/images/2015-06-28-medietilsynsdata/Registreringspliktige_kringkastere_register_-_aktive.pdf">PDF</a>] - - <ul> - <li>Kabelsendt fjernsyn - <li>Satellittsendt fjernsyn - <li>Nett-tv - <li>Kabelsendt radio - <li>Satellittsendt radio - <li>Nett-radio - </ul></li> -</ul> - -Vi mÃ¥ ta forbehold om at det kan vÃ¦re enkelte feil i oversiktene -siden disse ikke er oppdaterte pr. dags dato. Vi vil foreta nye -oppdateringer i august. - -Med hilsen - -Hanne Nistad Sekkelsten - SeniorrÃ¥dgiver | Senior Legal Adviser - Medietilsynet | Norwegian Media Authority - A: Nygata 4, NO-1607 Fredrikstad - T: [telefonnummer fjernet] - E: [adresse fjernet] | W: www.medietilsynet.no - -</blockquote> - -Desverre er formatene for ustrukturerte til maskinell behandling og -mangler endel informasjon, men det er gode oversikter over hvem -Medietilsynet fÃ¸rer tilsyn med. Filene er pÃ¥ formatene PDF, XPS -(XML-basert PDF-lignende format fra Microsoft) og DOCX, sÃ¥ det vil -vÃ¦re en stor jobb Ã¥ strukturere informasjonen pÃ¥ en mÃ¥te som kan -importeres i OpenCorporates. Svaret er ikke i trÃ¥d med -<a href="http://lovdata.no/dokument/SF/forskrift/2013-04-05-959">Forskrift -om IT-standarder i offentlig forvaltning</a> som sier epostvedlegg -skal sendes som PDF, sÃ¥ jeg har gjorde PDF-utgaver av XPS og -DOCX-utgavene tilgjengelig for Ã¥ gjÃ¸re det enklere for alle Ã¥ se -innholdet. - - - diff --git a/blog/jXplorer__a_very_nice_LDAP_GUI.html b/blog/jXplorer__a_very_nice_LDAP_GUI.html index 0a977d6323..32b5be5c10 100644 --- a/blog/jXplorer__a_very_nice_LDAP_GUI.html +++ b/blog/jXplorer__a_very_nice_LDAP_GUI.html @@ -72,7 +72,7 @@ and remove the failing query. Nothing big, but very annoying.

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@@ -282,7 +282,7 @@ and remove the failing query. Nothing big, but very annoying.

@@ -294,7 +294,7 @@ and remove the failing query. Nothing big, but very annoying.

diff --git a/blog/listadmin__the_quick_way_to_moderate_mailman_lists___nice_free_software.html b/blog/listadmin__the_quick_way_to_moderate_mailman_lists___nice_free_software.html index fbc709a888..0b9822db93 100644 --- a/blog/listadmin__the_quick_way_to_moderate_mailman_lists___nice_free_software.html +++ b/blog/listadmin__the_quick_way_to_moderate_mailman_lists___nice_free_software.html @@ -141,7 +141,7 @@ sure why.

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@@ -351,7 +351,7 @@ sure why.

@@ -363,7 +363,7 @@ sure why.

diff --git a/blog/sitemap.xml b/blog/sitemap.xml index b2df4f33e1..35dbde6c81 100644 --- a/blog/sitemap.xml +++ b/blog/sitemap.xml @@ -2480,6 +2480,11 @@ 0.50 weekly + + http://people.skolelinux.org/pere/blog/The_life_and_death_of_a_laptop_battery.html + 0.50 + weekly + http://people.skolelinux.org/pere/blog/The_many_definitions_of_a_open_standard.html 0.50 diff --git a/blog/systemd__an_interesting_alternative_to_upstart.html b/blog/systemd__an_interesting_alternative_to_upstart.html index 5ddb3e8fc6..892977974c 100644 --- a/blog/systemd__an_interesting_alternative_to_upstart.html +++ b/blog/systemd__an_interesting_alternative_to_upstart.html @@ -90,7 +90,7 @@ with parallel booting enabled by default.

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@@ -300,7 +300,7 @@ with parallel booting enabled by default.

@@ -312,7 +312,7 @@ with parallel booting enabled by default.

diff --git a/blog/tags/3d-printer/index.html b/blog/tags/3d-printer/index.html index fd33f1dc4e..150682b76f 100644 --- a/blog/tags/3d-printer/index.html +++ b/blog/tags/3d-printer/index.html @@ -622,7 +622,7 @@ hÃ¥per det ikke gÃ¥r tapt pÃ¥ samme vis.

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September (2)

@@ -832,7 +832,7 @@ hÃ¥per det ikke gÃ¥r tapt pÃ¥ samme vis.

@@ -844,7 +844,7 @@ hÃ¥per det ikke gÃ¥r tapt pÃ¥ samme vis.

diff --git a/blog/tags/amiga/index.html b/blog/tags/amiga/index.html index b261d9fdf2..d8c0ae1a8e 100644 --- a/blog/tags/amiga/index.html +++ b/blog/tags/amiga/index.html @@ -76,7 +76,7 @@ pakke. Kanskje Aros kunne vÃ¦rt interessant for et NUUG-foredrag?

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@@ -286,7 +286,7 @@ pakke. Kanskje Aros kunne vÃ¦rt interessant for et NUUG-foredrag?

@@ -298,7 +298,7 @@ pakke. Kanskje Aros kunne vÃ¦rt interessant for et NUUG-foredrag?

diff --git a/blog/tags/aros/index.html b/blog/tags/aros/index.html index 7acd9a1321..e401dad32e 100644 --- a/blog/tags/aros/index.html +++ b/blog/tags/aros/index.html @@ -76,7 +76,7 @@ pakke. Kanskje Aros kunne vÃ¦rt interessant for et NUUG-foredrag?

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September (2)

@@ -286,7 +286,7 @@ pakke. Kanskje Aros kunne vÃ¦rt interessant for et NUUG-foredrag?

@@ -298,7 +298,7 @@ pakke. Kanskje Aros kunne vÃ¦rt interessant for et NUUG-foredrag?

diff --git a/blog/tags/bankid/index.html b/blog/tags/bankid/index.html index 0242187038..7301055cd9 100644 --- a/blog/tags/bankid/index.html +++ b/blog/tags/bankid/index.html @@ -482,7 +482,7 @@ til BankID-modellen.

August (2)

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@@ -692,7 +692,7 @@ til BankID-modellen.

@@ -704,7 +704,7 @@ til BankID-modellen.

diff --git a/blog/tags/bitcoin/index.html b/blog/tags/bitcoin/index.html index 9c323a0777..293006ca71 100644 --- a/blog/tags/bitcoin/index.html +++ b/blog/tags/bitcoin/index.html @@ -603,7 +603,7 @@ donations to the address

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@@ -813,7 +813,7 @@ donations to the address

@@ -825,7 +825,7 @@ donations to the address

diff --git a/blog/tags/bootsystem/index.html b/blog/tags/bootsystem/index.html index 4b498009f6..855f79049a 100644 --- a/blog/tags/bootsystem/index.html +++ b/blog/tags/bootsystem/index.html @@ -1191,7 +1191,7 @@ insserv'. Will need to test if that work. :)

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@@ -1401,7 +1401,7 @@ insserv'. Will need to test if that work. :)

@@ -1413,7 +1413,7 @@ insserv'. Will need to test if that work. :)

diff --git a/blog/tags/bsa/index.html b/blog/tags/bsa/index.html index d443c0fe52..62efee7af9 100644 --- a/blog/tags/bsa/index.html +++ b/blog/tags/bsa/index.html @@ -164,7 +164,7 @@ pÃ¥ Slashdot.

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@@ -374,7 +374,7 @@ pÃ¥ Slashdot.

@@ -386,7 +386,7 @@ pÃ¥ Slashdot.

diff --git a/blog/tags/chrpath/index.html b/blog/tags/chrpath/index.html index 9491afc988..33244e73b7 100644 --- a/blog/tags/chrpath/index.html +++ b/blog/tags/chrpath/index.html @@ -171,7 +171,7 @@ include a testsuite check.

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@@ -381,7 +381,7 @@ include a testsuite check.

@@ -393,7 +393,7 @@ include a testsuite check.

diff --git a/blog/tags/debian edu/index.html b/blog/tags/debian edu/index.html index 3f46f89a6b..728341ee57 100644 --- a/blog/tags/debian edu/index.html +++ b/blog/tags/debian edu/index.html @@ -14618,7 +14618,7 @@ be the only one fitting our needs. :/

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@@ -14828,7 +14828,7 @@ be the only one fitting our needs. :/

@@ -14840,7 +14840,7 @@ be the only one fitting our needs. :/

diff --git a/blog/tags/debian/debian.rss b/blog/tags/debian/debian.rss index fb8d81c774..b9e70406da 100644 --- a/blog/tags/debian/debian.rss +++ b/blog/tags/debian/debian.rss @@ -6,6 +6,137 @@ http://people.skolelinux.org/pere/blog/ + + The life and death of a laptop battery + http://people.skolelinux.org/pere/blog/The_life_and_death_of_a_laptop_battery.html + http://people.skolelinux.org/pere/blog/The_life_and_death_of_a_laptop_battery.html + Thu, 24 Sep 2015 16:00:00 +0200 + When I get a new laptop, the battery life time at the start is OK. +But this do not last. The last few laptops gave me a feeling that +within a year, the life time is just a fraction of what it used to be, +and it slowly become painful to use the laptop without power connected +all the time. Because of this, when I got a new Thinkpad X230 laptop +about two years ago, I decided to monitor its battery state to have +more hard facts when the battery started to fail. + +<img src="http://people.skolelinux.org/pere/blog/images/2015-09-24-laptop-battery-graph.png"/> + +First I tried to find a sensible Debian package to record the +battery status, assuming that this must be a problem already handled +by someone else. I found +<a href="https://tracker.debian.org/pkg/battery-stats">battery-stats</a>, +which collects statistics from the battery, but it was completely +broken. I sent a few suggestions to the maintainer, but decided to +write my own collector as a shell script while I waited for feedback +from him. Via +<a href="http://www.ifweassume.com/2013/08/the-de-evolution-of-my-laptop-battery.html">a +blog post about the battery development on a MacBook Air</a> I also +discovered +<a href="https://github.com/jradavenport/batlog.git">batlog</a>, not +available in Debian. + +I started my collector 2013-07-15, and it has been collecting +battery stats ever since. Now my +/var/log/hjemmenett-battery-status.log file contain around 115,000 +measurements, from the time the battery was working great until now, +when it is unable to charge above 7% of original capasity. My +colletor shell script is quite simple and look like this: + +<pre> +#!/bin/sh +# Inspired by +# http://www.ifweassume.com/2013/08/the-de-evolution-of-my-laptop-battery.html +# See also +# http://blog.sleeplessbeastie.eu/2013/01/02/debian-how-to-monitor-battery-capacity/ +logfile=/var/log/hjemmenett-battery-status.log + +files="manufacturer model_name technology serial_number \ + energy_full energy_full_design energy_now cycle_count status" + +if [ ! -e "$logfile" ] ; then + ( + printf "timestamp," + for f in $files; do + printf "%s," $f + done + echo + ) > "$logfile" +fi + +log_battery() { + # Print complete message in one echo call, to avoid race condition + # when several log processes run in parallell. + msg=$(printf "%s," $(date +%s); \ + for f in $files; do \ + printf "%s," $(cat $f); \ + done) + echo "$msg" +} + +cd /sys/class/power_supply + +for bat in BAT*; do + (cd $bat && log_battery >> "$logfile") +done +</pre> + +The script is called when the power management system detect a +change in the power status (power plug in or out), and when going into +and out of hibernation and suspend. In addition, it collect a value +every 10 minutes. This make it possible for me know when the battery +is discharging, charging and how the maximum charge change over time. +The code for the Debian package +<a href="https://github.com/petterreinholdtsen/battery-status">is now +available on github</a>. + +The collected log file look like this: + +<pre> +timestamp,manufacturer,model_name,technology,serial_number,energy_full,energy_full_design,energy_now,cycle_count,status, +1376591133,LGC,45N1025,Li-ion,974,62800000,62160000,39050000,0,Discharging, +[...] +1443090528,LGC,45N1025,Li-ion,974,4900000,62160000,4900000,0,Full, +1443090601,LGC,45N1025,Li-ion,974,4900000,62160000,4900000,0,Full, +</pre> + +I wrote a small script to create a graph of the charge development +over time. This graph depicted above show the slow death of mylaptop +battery. + +But why is this happening? Why are my laptop batteries always +dying in a year or two, while the batteries of space probes and +satellites keep working year after year. If we are to believe +<a href="http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries">Battery +University</a>, the cause is me charging the battery whenever I have a +chance, and the fix is to not charge the Lithium-ion batteries to 100% +all the time, but to stay below 90% of full charge most of the time. +I've been told that the Tesla electric cars +<a href="http://my.teslamotors.com/de_CH/forum/forums/battery-charge-limit">limit +the charge of their batteries to 80%</a>, with the option to charge to +100% when preparing for a longer trip (not that I would want a car +like Tesla where rights to privacy is abandoned, but that is another +story), which I guess is the option we should have for laptops on +Linux too. + +Is there a good and generic way with Linux to tell the battery to +stop charging at 80%, unless requested to charge to 100% once in +preparation for a longer trip? I found +<a href="http://askubuntu.com/questions/34452/how-can-i-limit-battery-charging-to-80-capacity">one +recipe on askubuntu for Ubuntu to limit charging on Thinkpad to +80%</a>, but could not get it to work (kernel module refused to +load). + +I wonder why the battery capacity was reported to be more than 100% +at the start. I also wonder why the "full capacity" increases some +times, and if it is possible to repeat the process to get the battery +back to design capacity. And I wonder if the discharge and charge +speed change over time, or if this stay the same. I did not yet try +to write a tool to calculate the derivative values of the battery +level, but suspect some interesting insights might be learned from +those. + + + New laptop - some more clues and ideas based on feedback http://people.skolelinux.org/pere/blog/New_laptop___some_more_clues_and_ideas_based_on_feedback.html diff --git a/blog/tags/debian/index.html b/blog/tags/debian/index.html index ebdf64d283..268a5bfd6b 100644 --- a/blog/tags/debian/index.html +++ b/blog/tags/debian/index.html @@ -20,6 +20,149 @@

Entries tagged "debian".

+ The life and death of a laptop battery +

+ 24th September 2015 +

+ +

+#!/bin/sh
+# Inspired by
+# http://www.ifweassume.com/2013/08/the-de-evolution-of-my-laptop-battery.html
+# See also
+# http://blog.sleeplessbeastie.eu/2013/01/02/debian-how-to-monitor-battery-capacity/
+logfile=/var/log/hjemmenett-battery-status.log
+
+files="manufacturer model_name technology serial_number \
+    energy_full energy_full_design energy_now cycle_count status"
+
+if [ ! -e "$logfile" ] ; then
+    (
+	printf "timestamp,"
+	for f in $files; do
+	    printf "%s," $f
+	done
+	echo
+    ) > "$logfile"
+fi
+
+log_battery() {
+    # Print complete message in one echo call, to avoid race condition
+    # when several log processes run in parallell.
+    msg=$(printf "%s," $(date +%s); \
+	for f in $files; do \
+	    printf "%s," $(cat $f); \
+	done)
+    echo "$msg"
+}
+
+cd /sys/class/power_supply
+
+for bat in BAT*; do
+    (cd $bat && log_battery >> "$logfile")
+done
+

+ +

The collected log file look like this:

+ +

+timestamp,manufacturer,model_name,technology,serial_number,energy_full,energy_full_design,energy_now,cycle_count,status,
+1376591133,LGC,45N1025,Li-ion,974,62800000,62160000,39050000,0,Discharging,
+[...]
+1443090528,LGC,45N1025,Li-ion,974,4900000,62160000,4900000,0,Full,
+1443090601,LGC,45N1025,Li-ion,974,4900000,62160000,4900000,0,Full,
+

+ +

I wrote a small script to create a graph of the charge development +over time. This graph depicted above show the slow death of mylaptop +battery.

+ +

+ + + Tags: debian, english. + + +

New laptop - some more clues and ideas based on feedback @@ -9144,7 +9287,7 @@ be the only one fitting our needs. :/

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@@ -9354,7 +9497,7 @@ be the only one fitting our needs. :/

@@ -9366,7 +9509,7 @@ be the only one fitting our needs. :/

diff --git a/blog/tags/digistan/index.html b/blog/tags/digistan/index.html index ada13c553d..e958393c67 100644 --- a/blog/tags/digistan/index.html +++ b/blog/tags/digistan/index.html @@ -1263,7 +1263,7 @@ produkter basert pÃ¥ standarden.

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@@ -1473,7 +1473,7 @@ produkter basert pÃ¥ standarden.

@@ -1485,7 +1485,7 @@ produkter basert pÃ¥ standarden.

diff --git a/blog/tags/dld/index.html b/blog/tags/dld/index.html index 2484689bf1..7f14a60fcd 100644 --- a/blog/tags/dld/index.html +++ b/blog/tags/dld/index.html @@ -1404,7 +1404,7 @@ fÃ¥r snart se om det stemmer.

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September (2)

@@ -1614,7 +1614,7 @@ fÃ¥r snart se om det stemmer.

@@ -1626,7 +1626,7 @@ fÃ¥r snart se om det stemmer.

diff --git a/blog/tags/docbook/index.html b/blog/tags/docbook/index.html index 179a4e3512..d54566659c 100644 --- a/blog/tags/docbook/index.html +++ b/blog/tags/docbook/index.html @@ -1241,7 +1241,7 @@ slik at du kan oppdatere direkte.

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September (2)

@@ -1451,7 +1451,7 @@ slik at du kan oppdatere direkte.

@@ -1463,7 +1463,7 @@ slik at du kan oppdatere direkte.

diff --git a/blog/tags/drivstoffpriser/index.html b/blog/tags/drivstoffpriser/index.html index 9640d69fa9..de2b01b08d 100644 --- a/blog/tags/drivstoffpriser/index.html +++ b/blog/tags/drivstoffpriser/index.html @@ -505,7 +505,7 @@ en liste med stasjoner pÃ¥ samme format som PriserVedStasjoner.

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September (2)

@@ -715,7 +715,7 @@ en liste med stasjoner pÃ¥ samme format som PriserVedStasjoner.

@@ -727,7 +727,7 @@ en liste med stasjoner pÃ¥ samme format som PriserVedStasjoner.

diff --git a/blog/tags/english/english.rss b/blog/tags/english/english.rss index 17f3443a47..a2fb0d3312 100644 --- a/blog/tags/english/english.rss +++ b/blog/tags/english/english.rss @@ -6,6 +6,137 @@ http://people.skolelinux.org/pere/blog/ + + The life and death of a laptop battery + http://people.skolelinux.org/pere/blog/The_life_and_death_of_a_laptop_battery.html + http://people.skolelinux.org/pere/blog/The_life_and_death_of_a_laptop_battery.html + Thu, 24 Sep 2015 16:00:00 +0200 + When I get a new laptop, the battery life time at the start is OK. +But this do not last. The last few laptops gave me a feeling that +within a year, the life time is just a fraction of what it used to be, +and it slowly become painful to use the laptop without power connected +all the time. Because of this, when I got a new Thinkpad X230 laptop +about two years ago, I decided to monitor its battery state to have +more hard facts when the battery started to fail. + +<img src="http://people.skolelinux.org/pere/blog/images/2015-09-24-laptop-battery-graph.png"/> + +First I tried to find a sensible Debian package to record the +battery status, assuming that this must be a problem already handled +by someone else. I found +<a href="https://tracker.debian.org/pkg/battery-stats">battery-stats</a>, +which collects statistics from the battery, but it was completely +broken. I sent a few suggestions to the maintainer, but decided to +write my own collector as a shell script while I waited for feedback +from him. Via +<a href="http://www.ifweassume.com/2013/08/the-de-evolution-of-my-laptop-battery.html">a +blog post about the battery development on a MacBook Air</a> I also +discovered +<a href="https://github.com/jradavenport/batlog.git">batlog</a>, not +available in Debian. + +I started my collector 2013-07-15, and it has been collecting +battery stats ever since. Now my +/var/log/hjemmenett-battery-status.log file contain around 115,000 +measurements, from the time the battery was working great until now, +when it is unable to charge above 7% of original capasity. My +colletor shell script is quite simple and look like this: + +<pre> +#!/bin/sh +# Inspired by +# http://www.ifweassume.com/2013/08/the-de-evolution-of-my-laptop-battery.html +# See also +# http://blog.sleeplessbeastie.eu/2013/01/02/debian-how-to-monitor-battery-capacity/ +logfile=/var/log/hjemmenett-battery-status.log + +files="manufacturer model_name technology serial_number \ + energy_full energy_full_design energy_now cycle_count status" + +if [ ! -e "$logfile" ] ; then + ( + printf "timestamp," + for f in $files; do + printf "%s," $f + done + echo + ) > "$logfile" +fi + +log_battery() { + # Print complete message in one echo call, to avoid race condition + # when several log processes run in parallell. + msg=$(printf "%s," $(date +%s); \ + for f in $files; do \ + printf "%s," $(cat $f); \ + done) + echo "$msg" +} + +cd /sys/class/power_supply + +for bat in BAT*; do + (cd $bat && log_battery >> "$logfile") +done +</pre> + +The script is called when the power management system detect a +change in the power status (power plug in or out), and when going into +and out of hibernation and suspend. In addition, it collect a value +every 10 minutes. This make it possible for me know when the battery +is discharging, charging and how the maximum charge change over time. +The code for the Debian package +<a href="https://github.com/petterreinholdtsen/battery-status">is now +available on github</a>. + +The collected log file look like this: + +<pre> +timestamp,manufacturer,model_name,technology,serial_number,energy_full,energy_full_design,energy_now,cycle_count,status, +1376591133,LGC,45N1025,Li-ion,974,62800000,62160000,39050000,0,Discharging, +[...] +1443090528,LGC,45N1025,Li-ion,974,4900000,62160000,4900000,0,Full, +1443090601,LGC,45N1025,Li-ion,974,4900000,62160000,4900000,0,Full, +</pre> + +I wrote a small script to create a graph of the charge development +over time. This graph depicted above show the slow death of mylaptop +battery. + +But why is this happening? Why are my laptop batteries always +dying in a year or two, while the batteries of space probes and +satellites keep working year after year. If we are to believe +<a href="http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries">Battery +University</a>, the cause is me charging the battery whenever I have a +chance, and the fix is to not charge the Lithium-ion batteries to 100% +all the time, but to stay below 90% of full charge most of the time. +I've been told that the Tesla electric cars +<a href="http://my.teslamotors.com/de_CH/forum/forums/battery-charge-limit">limit +the charge of their batteries to 80%</a>, with the option to charge to +100% when preparing for a longer trip (not that I would want a car +like Tesla where rights to privacy is abandoned, but that is another +story), which I guess is the option we should have for laptops on +Linux too. + +Is there a good and generic way with Linux to tell the battery to +stop charging at 80%, unless requested to charge to 100% once in +preparation for a longer trip? I found +<a href="http://askubuntu.com/questions/34452/how-can-i-limit-battery-charging-to-80-capacity">one +recipe on askubuntu for Ubuntu to limit charging on Thinkpad to +80%</a>, but could not get it to work (kernel module refused to +load). + +I wonder why the battery capacity was reported to be more than 100% +at the start. I also wonder why the "full capacity" increases some +times, and if it is possible to repeat the process to get the battery +back to design capacity. And I wonder if the discharge and charge +speed change over time, or if this stay the same. I did not yet try +to write a tool to calculate the derivative values of the battery +level, but suspect some interesting insights might be learned from +those. + + + Book cover for the Free Culture book finally done http://people.skolelinux.org/pere/blog/Book_cover_for_the_Free_Culture_book_finally_done.html diff --git a/blog/tags/english/index.html b/blog/tags/english/index.html index b7f38dcb84..48fb45b750 100644 --- a/blog/tags/english/index.html +++ b/blog/tags/english/index.html @@ -20,6 +20,149 @@

Entries tagged "english".

+ The life and death of a laptop battery +

+ 24th September 2015 +

+ +

+#!/bin/sh
+# Inspired by
+# http://www.ifweassume.com/2013/08/the-de-evolution-of-my-laptop-battery.html
+# See also
+# http://blog.sleeplessbeastie.eu/2013/01/02/debian-how-to-monitor-battery-capacity/
+logfile=/var/log/hjemmenett-battery-status.log
+
+files="manufacturer model_name technology serial_number \
+    energy_full energy_full_design energy_now cycle_count status"
+
+if [ ! -e "$logfile" ] ; then
+    (
+	printf "timestamp,"
+	for f in $files; do
+	    printf "%s," $f
+	done
+	echo
+    ) > "$logfile"
+fi
+
+log_battery() {
+    # Print complete message in one echo call, to avoid race condition
+    # when several log processes run in parallell.
+    msg=$(printf "%s," $(date +%s); \
+	for f in $files; do \
+	    printf "%s," $(cat $f); \
+	done)
+    echo "$msg"
+}
+
+cd /sys/class/power_supply
+
+for bat in BAT*; do
+    (cd $bat && log_battery >> "$logfile")
+done
+

+ +

The collected log file look like this:

+ +

+timestamp,manufacturer,model_name,technology,serial_number,energy_full,energy_full_design,energy_now,cycle_count,status,
+1376591133,LGC,45N1025,Li-ion,974,62800000,62160000,39050000,0,Discharging,
+[...]
+1443090528,LGC,45N1025,Li-ion,974,4900000,62160000,4900000,0,Full,
+1443090601,LGC,45N1025,Li-ion,974,4900000,62160000,4900000,0,Full,
+

+ +

I wrote a small script to create a graph of the charge development +over time. This graph depicted above show the slow death of mylaptop +battery.

+ +

+ + + Tags: debian, english. + + +

Book cover for the Free Culture book finally done @@ -23469,7 +23612,7 @@ be the only one fitting our needs. :/

August (2)

September (1)

September (2)

@@ -23679,7 +23822,7 @@ be the only one fitting our needs. :/

@@ -23691,7 +23834,7 @@ be the only one fitting our needs. :/

diff --git a/blog/tags/fiksgatami/index.html b/blog/tags/fiksgatami/index.html index c7e022203f..6bfa404f38 100644 --- a/blog/tags/fiksgatami/index.html +++ b/blog/tags/fiksgatami/index.html @@ -1356,7 +1356,7 @@ med dem. Dette blir bra.

August (2)

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September (2)

@@ -1566,7 +1566,7 @@ med dem. Dette blir bra.

@@ -1578,7 +1578,7 @@ med dem. Dette blir bra.

diff --git a/blog/tags/fildeling/index.html b/blog/tags/fildeling/index.html index 2dd09a3a34..d32d12fcb4 100644 --- a/blog/tags/fildeling/index.html +++ b/blog/tags/fildeling/index.html @@ -649,7 +649,7 @@ og fildeling av slike filer er fullt ut lovlig.

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September (1)

September (2)

@@ -859,7 +859,7 @@ og fildeling av slike filer er fullt ut lovlig.

@@ -871,7 +871,7 @@ og fildeling av slike filer er fullt ut lovlig.

diff --git a/blog/tags/freeculture/index.html b/blog/tags/freeculture/index.html index 0984d1ae5d..e6dcc6a5bc 100644 --- a/blog/tags/freeculture/index.html +++ b/blog/tags/freeculture/index.html @@ -1360,7 +1360,7 @@ slik at du kan oppdatere direkte.

August (2)

September (1)

September (2)

@@ -1570,7 +1570,7 @@ slik at du kan oppdatere direkte.

@@ -1582,7 +1582,7 @@ slik at du kan oppdatere direkte.

diff --git a/blog/tags/freedombox/index.html b/blog/tags/freedombox/index.html index ed37de5870..2650a74478 100644 --- a/blog/tags/freedombox/index.html +++ b/blog/tags/freedombox/index.html @@ -950,7 +950,7 @@ default password is 'secret'.

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September (2)

@@ -1160,7 +1160,7 @@ default password is 'secret'.

@@ -1172,7 +1172,7 @@ default password is 'secret'.

diff --git a/blog/tags/frikanalen/index.html b/blog/tags/frikanalen/index.html index 09e7a9bcf7..98dd9f5ece 100644 --- a/blog/tags/frikanalen/index.html +++ b/blog/tags/frikanalen/index.html @@ -1335,7 +1335,7 @@ NUUG lykkes med Ã¥ fÃ¥ ut sine opptak med like stor suksess.

August (2)

September (1)

September (2)

@@ -1545,7 +1545,7 @@ NUUG lykkes med Ã¥ fÃ¥ ut sine opptak med like stor suksess.

@@ -1557,7 +1557,7 @@ NUUG lykkes med Ã¥ fÃ¥ ut sine opptak med like stor suksess.

diff --git a/blog/tags/h264/index.html b/blog/tags/h264/index.html index 63c65e6325..ea7d251e12 100644 --- a/blog/tags/h264/index.html +++ b/blog/tags/h264/index.html @@ -2522,7 +2522,7 @@ sure hope it was using the announced Ogg Theora support. :)

August (2)

September (1)

September (2)

@@ -2732,7 +2732,7 @@ sure hope it was using the announced Ogg Theora support. :)

@@ -2744,7 +2744,7 @@ sure hope it was using the announced Ogg Theora support. :)

diff --git a/blog/tags/intervju/index.html b/blog/tags/intervju/index.html index eedc69e108..0a93fed818 100644 --- a/blog/tags/intervju/index.html +++ b/blog/tags/intervju/index.html @@ -5144,7 +5144,7 @@ veldig bra utvalg av gratis spill som er av hÃ¸y kvalitet. Veldig lett

August (2)

September (1)

September (2)

@@ -5354,7 +5354,7 @@ veldig bra utvalg av gratis spill som er av hÃ¸y kvalitet. Veldig lett

@@ -5366,7 +5366,7 @@ veldig bra utvalg av gratis spill som er av hÃ¸y kvalitet. Veldig lett

diff --git a/blog/tags/isenkram/index.html b/blog/tags/isenkram/index.html index b0ceb9685c..75a6d52a3c 100644 --- a/blog/tags/isenkram/index.html +++ b/blog/tags/isenkram/index.html @@ -1061,7 +1061,7 @@ please send me an email. :)

August (2)

September (1)

September (2)

@@ -1271,7 +1271,7 @@ please send me an email. :)

@@ -1283,7 +1283,7 @@ please send me an email. :)

diff --git a/blog/tags/kart/index.html b/blog/tags/kart/index.html index b2f23aeb20..af8877d845 100644 --- a/blog/tags/kart/index.html +++ b/blog/tags/kart/index.html @@ -1426,7 +1426,7 @@ det viser at behovet for fribruks-sjÃ¸kart er til stedet.

August (2)

September (1)

September (2)

@@ -1636,7 +1636,7 @@ det viser at behovet for fribruks-sjÃ¸kart er til stedet.

@@ -1648,7 +1648,7 @@ det viser at behovet for fribruks-sjÃ¸kart er til stedet.

diff --git a/blog/tags/ldap/index.html b/blog/tags/ldap/index.html index f03cd3e9c9..49ee4475d1 100644 --- a/blog/tags/ldap/index.html +++ b/blog/tags/ldap/index.html @@ -1066,7 +1066,7 @@ new IETF work group?

August (2)

September (1)

September (2)

@@ -1276,7 +1276,7 @@ new IETF work group?

@@ -1288,7 +1288,7 @@ new IETF work group?

diff --git a/blog/tags/lenker/index.html b/blog/tags/lenker/index.html index 88e0191629..77d4107dab 100644 --- a/blog/tags/lenker/index.html +++ b/blog/tags/lenker/index.html @@ -661,7 +661,7 @@ Word 2007 hÃ¥ndterer ODF dÃ¥rlig

August (2)

September (1)

September (2)

@@ -871,7 +871,7 @@ Word 2007 hÃ¥ndterer ODF dÃ¥rlig

@@ -883,7 +883,7 @@ Word 2007 hÃ¥ndterer ODF dÃ¥rlig

diff --git a/blog/tags/lsdvd/index.html b/blog/tags/lsdvd/index.html index eedea0ca23..6d038770da 100644 --- a/blog/tags/lsdvd/index.html +++ b/blog/tags/lsdvd/index.html @@ -147,7 +147,7 @@ list. :)

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September (2)

@@ -357,7 +357,7 @@ list. :)

@@ -369,7 +369,7 @@ list. :)

diff --git a/blog/tags/ltsp/index.html b/blog/tags/ltsp/index.html index b27d649ba5..c667e8cf45 100644 --- a/blog/tags/ltsp/index.html +++ b/blog/tags/ltsp/index.html @@ -81,7 +81,7 @@ of these cards.

August (2)

September (1)

September (2)

@@ -291,7 +291,7 @@ of these cards.

@@ -303,7 +303,7 @@ of these cards.

diff --git a/blog/tags/mesh network/index.html b/blog/tags/mesh network/index.html index 31539c2b4c..6cd8406092 100644 --- a/blog/tags/mesh network/index.html +++ b/blog/tags/mesh network/index.html @@ -731,7 +731,7 @@ mesh system.

August (2)

September (1)

September (2)

@@ -941,7 +941,7 @@ mesh system.

@@ -953,7 +953,7 @@ mesh system.

diff --git a/blog/tags/multimedia/index.html b/blog/tags/multimedia/index.html index 478996c80e..3da8979a3f 100644 --- a/blog/tags/multimedia/index.html +++ b/blog/tags/multimedia/index.html @@ -3157,7 +3157,7 @@ be the only one fitting our needs. :/

August (2)

September (1)

September (2)

@@ -3367,7 +3367,7 @@ be the only one fitting our needs. :/

@@ -3379,7 +3379,7 @@ be the only one fitting our needs. :/

diff --git a/blog/tags/norsk/index.html b/blog/tags/norsk/index.html index c0d87478e2..7b912fc356 100644 --- a/blog/tags/norsk/index.html +++ b/blog/tags/norsk/index.html @@ -22705,7 +22705,7 @@ forsÃ¸k.

August (2)

September (1)

September (2)

@@ -22915,7 +22915,7 @@ forsÃ¸k.

@@ -22927,7 +22927,7 @@ forsÃ¸k.

diff --git a/blog/tags/nuug/index.html b/blog/tags/nuug/index.html index 66cf0743a3..6efebddf4c 100644 --- a/blog/tags/nuug/index.html +++ b/blog/tags/nuug/index.html @@ -12188,7 +12188,7 @@ hÃ¥per det ikke gÃ¥r tapt pÃ¥ samme vis.

August (2)

September (1)

September (2)

@@ -12398,7 +12398,7 @@ hÃ¥per det ikke gÃ¥r tapt pÃ¥ samme vis.

@@ -12410,7 +12410,7 @@ hÃ¥per det ikke gÃ¥r tapt pÃ¥ samme vis.

diff --git a/blog/tags/offentlig innsyn/index.html b/blog/tags/offentlig innsyn/index.html index b274e20aba..d5f0872707 100644 --- a/blog/tags/offentlig innsyn/index.html +++ b/blog/tags/offentlig innsyn/index.html @@ -2136,7 +2136,7 @@ til Ã¥ levere hver uke. Har ikke undersÃ¸kt noen av de andre.

August (2)

September (1)

September (2)

@@ -2346,7 +2346,7 @@ til Ã¥ levere hver uke. Har ikke undersÃ¸kt noen av de andre.

@@ -2358,7 +2358,7 @@ til Ã¥ levere hver uke. Har ikke undersÃ¸kt noen av de andre.

diff --git a/blog/tags/open311/index.html b/blog/tags/open311/index.html index 64a978cec9..bc2977c46c 100644 --- a/blog/tags/open311/index.html +++ b/blog/tags/open311/index.html @@ -176,7 +176,7 @@ work like the free software project communities I am used to.

August (2)

September (1)

September (2)

@@ -386,7 +386,7 @@ work like the free software project communities I am used to.

@@ -398,7 +398,7 @@ work like the free software project communities I am used to.

diff --git a/blog/tags/opphavsrett/index.html b/blog/tags/opphavsrett/index.html index 0d42b4defe..acf0b4d1c8 100644 --- a/blog/tags/opphavsrett/index.html +++ b/blog/tags/opphavsrett/index.html @@ -6101,7 +6101,7 @@ database.

August (2)

September (1)

September (2)

@@ -6311,7 +6311,7 @@ database.

@@ -6323,7 +6323,7 @@ database.

diff --git a/blog/tags/personvern/index.html b/blog/tags/personvern/index.html index 5605908310..2d1a663be2 100644 --- a/blog/tags/personvern/index.html +++ b/blog/tags/personvern/index.html @@ -7652,7 +7652,7 @@ kontanter for noen dager siden.

August (2)

September (1)

September (2)

@@ -7862,7 +7862,7 @@ kontanter for noen dager siden.

@@ -7874,7 +7874,7 @@ kontanter for noen dager siden.

diff --git a/blog/tags/raid/index.html b/blog/tags/raid/index.html index d8c855503f..db89624762 100644 --- a/blog/tags/raid/index.html +++ b/blog/tags/raid/index.html @@ -117,7 +117,7 @@ disk(s) is failing when the RAID is running short on disks.

August (2)

September (1)

September (2)

@@ -327,7 +327,7 @@ disk(s) is failing when the RAID is running short on disks.

@@ -339,7 +339,7 @@ disk(s) is failing when the RAID is running short on disks.

diff --git a/blog/tags/reactos/index.html b/blog/tags/reactos/index.html index 2dee8fd90b..1de676da31 100644 --- a/blog/tags/reactos/index.html +++ b/blog/tags/reactos/index.html @@ -116,7 +116,7 @@ image.

August (2)

September (1)

September (2)

@@ -326,7 +326,7 @@ image.

@@ -338,7 +338,7 @@ image.

diff --git a/blog/tags/reprap/index.html b/blog/tags/reprap/index.html index 633d4a7e7a..efcfcb1a35 100644 --- a/blog/tags/reprap/index.html +++ b/blog/tags/reprap/index.html @@ -543,7 +543,7 @@ hÃ¥per det ikke gÃ¥r tapt pÃ¥ samme vis.

August (2)

September (1)

September (2)

@@ -753,7 +753,7 @@ hÃ¥per det ikke gÃ¥r tapt pÃ¥ samme vis.

@@ -765,7 +765,7 @@ hÃ¥per det ikke gÃ¥r tapt pÃ¥ samme vis.

diff --git a/blog/tags/rfid/index.html b/blog/tags/rfid/index.html index c3b3d4d26b..265f00bf35 100644 --- a/blog/tags/rfid/index.html +++ b/blog/tags/rfid/index.html @@ -447,7 +447,7 @@ mer om de nye biometriske passene.

August (2)

September (1)

September (2)

@@ -657,7 +657,7 @@ mer om de nye biometriske passene.

@@ -669,7 +669,7 @@ mer om de nye biometriske passene.

diff --git a/blog/tags/robot/index.html b/blog/tags/robot/index.html index 2103ca7bf7..bd25313f63 100644 --- a/blog/tags/robot/index.html +++ b/blog/tags/robot/index.html @@ -481,7 +481,7 @@ firmwaren. :)

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September (2)

@@ -691,7 +691,7 @@ firmwaren. :)

@@ -703,7 +703,7 @@ firmwaren. :)

diff --git a/blog/tags/rss/index.html b/blog/tags/rss/index.html index 89eea9c1bf..9e1003fb39 100644 --- a/blog/tags/rss/index.html +++ b/blog/tags/rss/index.html @@ -70,7 +70,7 @@ forsÃ¸k.

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September (1)

September (2)

@@ -280,7 +280,7 @@ forsÃ¸k.

@@ -292,7 +292,7 @@ forsÃ¸k.

diff --git a/blog/tags/ruter/index.html b/blog/tags/ruter/index.html index 74cbeea99a..d49b67b041 100644 --- a/blog/tags/ruter/index.html +++ b/blog/tags/ruter/index.html @@ -224,7 +224,7 @@ OsloomrÃ¥det.

August (2)

September (1)

September (2)

@@ -434,7 +434,7 @@ OsloomrÃ¥det.

@@ -446,7 +446,7 @@ OsloomrÃ¥det.

diff --git a/blog/tags/scraperwiki/index.html b/blog/tags/scraperwiki/index.html index 99996055a4..e2b37143f9 100644 --- a/blog/tags/scraperwiki/index.html +++ b/blog/tags/scraperwiki/index.html @@ -159,7 +159,7 @@ av Ã¥ dele informasjon med andre uten bruksbegresninger.

August (2)

September (1)

September (2)

@@ -369,7 +369,7 @@ av Ã¥ dele informasjon med andre uten bruksbegresninger.

@@ -381,7 +381,7 @@ av Ã¥ dele informasjon med andre uten bruksbegresninger.

diff --git a/blog/tags/sikkerhet/index.html b/blog/tags/sikkerhet/index.html index 69ac364da1..08a128dda2 100644 --- a/blog/tags/sikkerhet/index.html +++ b/blog/tags/sikkerhet/index.html @@ -3140,7 +3140,7 @@ betydelige.

August (2)

September (1)

September (2)

@@ -3350,7 +3350,7 @@ betydelige.

@@ -3362,7 +3362,7 @@ betydelige.

diff --git a/blog/tags/sitesummary/index.html b/blog/tags/sitesummary/index.html index ffb4da3c85..7e26c57934 100644 --- a/blog/tags/sitesummary/index.html +++ b/blog/tags/sitesummary/index.html @@ -275,7 +275,7 @@ everything is taken care of.

August (2)

September (1)

September (2)

@@ -485,7 +485,7 @@ everything is taken care of.

@@ -497,7 +497,7 @@ everything is taken care of.

diff --git a/blog/tags/skepsis/index.html b/blog/tags/skepsis/index.html index ff3f72a676..2ece7687fb 100644 --- a/blog/tags/skepsis/index.html +++ b/blog/tags/skepsis/index.html @@ -408,7 +408,7 @@ skyskrapere. Takke meg til en tur til mÃ¥nen.

August (2)

September (1)

September (2)

@@ -618,7 +618,7 @@ skyskrapere. Takke meg til en tur til mÃ¥nen.

@@ -630,7 +630,7 @@ skyskrapere. Takke meg til en tur til mÃ¥nen.

diff --git a/blog/tags/standard/index.html b/blog/tags/standard/index.html index 7949c32d87..39d433c29b 100644 --- a/blog/tags/standard/index.html +++ b/blog/tags/standard/index.html @@ -4468,7 +4468,7 @@ Kjenner kun til ufullstendige lÃ¸sninger for slikt.

August (2)

September (1)

September (2)

@@ -4678,7 +4678,7 @@ Kjenner kun til ufullstendige lÃ¸sninger for slikt.

@@ -4690,7 +4690,7 @@ Kjenner kun til ufullstendige lÃ¸sninger for slikt.

diff --git a/blog/tags/stavekontroll/index.html b/blog/tags/stavekontroll/index.html index 176df2328a..89d4ff512f 100644 --- a/blog/tags/stavekontroll/index.html +++ b/blog/tags/stavekontroll/index.html @@ -254,7 +254,7 @@ stavekontrollen.

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September (2)

@@ -464,7 +464,7 @@ stavekontrollen.

@@ -476,7 +476,7 @@ stavekontrollen.

diff --git a/blog/tags/stortinget/index.html b/blog/tags/stortinget/index.html index 0e70d0eebf..7aa4410d0d 100644 --- a/blog/tags/stortinget/index.html +++ b/blog/tags/stortinget/index.html @@ -851,7 +851,7 @@ at vi i NUUG har fÃ¥tt operativ en norsk utgave av

August (2)

September (1)

September (2)

@@ -1061,7 +1061,7 @@ at vi i NUUG har fÃ¥tt operativ en norsk utgave av

@@ -1073,7 +1073,7 @@ at vi i NUUG har fÃ¥tt operativ en norsk utgave av

diff --git a/blog/tags/surveillance/index.html b/blog/tags/surveillance/index.html index 4722fcb243..0522a3c02f 100644 --- a/blog/tags/surveillance/index.html +++ b/blog/tags/surveillance/index.html @@ -2595,7 +2595,7 @@ automatisk over i spesialkartet.

August (2)

September (1)

September (2)

@@ -2805,7 +2805,7 @@ automatisk over i spesialkartet.

@@ -2817,7 +2817,7 @@ automatisk over i spesialkartet.

diff --git a/blog/tags/sysadmin/index.html b/blog/tags/sysadmin/index.html index 3182896638..a3f695f8f9 100644 --- a/blog/tags/sysadmin/index.html +++ b/blog/tags/sysadmin/index.html @@ -228,7 +228,7 @@ and DHCP updates I wanted to do.

August (2)

September (1)

September (2)

@@ -438,7 +438,7 @@ and DHCP updates I wanted to do.

@@ -450,7 +450,7 @@ and DHCP updates I wanted to do.

diff --git a/blog/tags/usenix/index.html b/blog/tags/usenix/index.html index c55131ae0a..20067a06e6 100644 --- a/blog/tags/usenix/index.html +++ b/blog/tags/usenix/index.html @@ -245,7 +245,7 @@ for other sites to consider too?

August (2)

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@@ -455,7 +455,7 @@ for other sites to consider too?

@@ -467,7 +467,7 @@ for other sites to consider too?

diff --git a/blog/tags/valg/index.html b/blog/tags/valg/index.html index 21377a94a9..050d90c446 100644 --- a/blog/tags/valg/index.html +++ b/blog/tags/valg/index.html @@ -957,7 +957,7 @@ inneholdt i Iran hvis de ikke hadde hemmelige valg?

August (2)

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September (2)

@@ -1167,7 +1167,7 @@ inneholdt i Iran hvis de ikke hadde hemmelige valg?

@@ -1179,7 +1179,7 @@ inneholdt i Iran hvis de ikke hadde hemmelige valg?

diff --git a/blog/tags/video/index.html b/blog/tags/video/index.html index 1193d73ca4..f492bc2b06 100644 --- a/blog/tags/video/index.html +++ b/blog/tags/video/index.html @@ -4676,7 +4676,7 @@ larger stick as well.

August (2)

September (1)

September (2)

@@ -4886,7 +4886,7 @@ larger stick as well.

@@ -4898,7 +4898,7 @@ larger stick as well.

diff --git a/blog/tags/vitenskap/index.html b/blog/tags/vitenskap/index.html index d87393e145..3db248ed7c 100644 --- a/blog/tags/vitenskap/index.html +++ b/blog/tags/vitenskap/index.html @@ -411,7 +411,7 @@ skyskrapere. Takke meg til en tur til mÃ¥nen.

August (2)

September (1)

September (2)

@@ -621,7 +621,7 @@ skyskrapere. Takke meg til en tur til mÃ¥nen.

@@ -633,7 +633,7 @@ skyskrapere. Takke meg til en tur til mÃ¥nen.

diff --git a/blog/tags/web/index.html b/blog/tags/web/index.html index 5c22970e3b..8e476080da 100644 --- a/blog/tags/web/index.html +++ b/blog/tags/web/index.html @@ -3450,7 +3450,7 @@ be the only one fitting our needs. :/

August (2)

September (1)

September (2)

@@ -3660,7 +3660,7 @@ be the only one fitting our needs. :/

@@ -3672,7 +3672,7 @@ be the only one fitting our needs. :/

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