[Gta04-owner] Now that 3.2-final is out...

[Neil Jerram]

Neil Jerram <neil at ossau.homelinux.net> writes:

> I just compiled a new kernel from 3.2-gta04 (bb54650b).

I did an experiment to measure how long my battery will last for, with
the Phoenux on -- not suspended -- but not doing anything and with all
RF killed; and also to look for any strange patterns that might indicate
that my battery is no good.  I'd appreciate if battery-knowledgeable
people could take a look and let me know if they see any cause for
concern here.

The battery lasted 264 minutes before the Phoenux switched off.  The
attached graphs show voltage, discharging current and capacity (all from
/sys/class/power_supply/bq27000-battery/uevent) against time in minutes.

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For what they're worth, my observations are as follows.

- The gradual decrease in voltage (over most of the time period) matches
  how people have said the battery behaves - in particular in connection
  with needing >= 3.8V for the Phoenux to boot up.

- I guess that the gradual increase in current is to compensate for this
  decrease in voltage, assuming that the components in the system
  require a constant amount of power.

- I have no idea what causes the much sharper decrease in voltage, and
  matching increase in current, a few minutes before the Phoenux
  switches off. 

Regards,
    Neil