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+Title: Discharge rate estimate in new battery statistics collector for Debian
+Tags: english, debian
+Date: 2016-05-23 09:30
+
+<p>Yesterday I updated the battery-stats package in Debian with a few
+patches sent to me by skilled and enterprising users.  There are a few
+user nice and visible changes.  First of all, both the desktop menu
+entries now work.  A design flaw in one of the script made it fail if
+no controlling TTY was available.  So the script worked when called
+from the command line, but not when called from the desktop menu.</p>
+
+<p>The next new feature is a discharge rate estimator in one of the
+graphs (the one showing the last few hours).  It also got colors
+showing charging in blue and discharge in red.  The percentages of
+this graph is relative to last full charge, not battery design
+capacity.</p>
+
+<p><img align="center" src="http://people.skolelinux.org/pere/blog/images/2016-05-23-battery-stats-history.png"/></p>
+
+<p>The other graph show the entire history of the collected battery
+statistics, comparing it to the design capacity of the battery to see
+how the battery life time get shorter over time.  The red line in this
+graph is what the previous graph considers 100 percent:
+
+<p><img align="center" src="http://people.skolelinux.org/pere/blog/images/2016-05-23-battery-stats-rate.png"/></p>
+
+<p>You can see here that I only charge the battery to 80 percent of last
+full capacity, and how the capacity of the battery is shrinking. :(</p>
+
+<p>The last new feature is in the collector, which now will handle more
+hardware models.  On some hardware, Linux power supply information is
+stored in /sys/class/power_supply/ACAD/, while the collector
+previously only looked in /sys/class/power_supply/AC/.  Now both are
+checked.</p>
+
+<p>If you are interested in how your laptop battery is doing, please
+check out the
+<a href="https://tracker.debian.org/pkg/battery-stats">battery-stats</a>
+in Debian unstable, or rebuild it on Jessie to get it working on
+Debian stable. :) The upstream source is available from
+<a href="https://github.com/petterreinholdtsen/battery-stats">github</a>.
+Patches are very welcome.</p>
+
+<p>As usual, if you use Bitcoin and want to show your support of my
+activities, please send Bitcoin donations to my address
+<b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>

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