X-Git-Url: http://pere.pagekite.me/gitweb/homepage.git/blobdiff_plain/5b6222f93f94e2721e119fb4a477de4a547e89ba..ce0ba53648b0c5e72f811cb13e028a8db444c0e4:/blog/The_life_and_death_of_a_laptop_battery.html diff --git a/blog/The_life_and_death_of_a_laptop_battery.html b/blog/The_life_and_death_of_a_laptop_battery.html index 0e0e3086b0..6ba1a56a10 100644 --- a/blog/The_life_and_death_of_a_laptop_battery.html +++ b/blog/The_life_and_death_of_a_laptop_battery.html @@ -50,8 +50,8 @@ available in Debian.

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:

+when it is unable to charge above 7% of original capacity. My +collector shell script is quite simple and look like this:

 #!/bin/sh
@@ -76,7 +76,7 @@ fi
 
 log_battery() {
     # Print complete message in one echo call, to avoid race condition
-    # when several log processes run in parallell.
+    # when several log processes run in parallel.
     msg=$(printf "%s," $(date +%s); \
 	for f in $files; do \
 	    printf "%s," $(cat $f); \
@@ -111,7 +111,7 @@ timestamp,manufacturer,model_name,technology,serial_number,energy_full,energy_fu

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 +over time. This graph depicted above show the slow death of my laptop battery.

But why is this happening? Why are my laptop batteries always @@ -145,6 +145,14 @@ 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.

+ +

Update 2015-09-24: I got a tip to install the packages +acpi-call-dkms and tlp (unfortunately missing in Debian stable) +packages instead of the tp-smapi-dkms package I had tried to use +initially, and use 'tlp setcharge 40 80' to change when charging start +and stop. I've done so now, but expect my existing battery is toast +and need to be replaced. The proposal is unfortunately Thinkpad +specific.

Tags: debian, english.
@@ -183,6 +191,10 @@ those.

  • September (2)
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