Funny battery values (nx6325)
dan at obluda.cz
Sat Mar 20 21:26:11 UTC 2010
Joerg Wunsch wrote:
> Battery state reporting went a little funny. As expected, it
> initially dropped quickly until it reported a remaining runtime of
> 0:00 (as that time was based on the nonsensical 279 mAh level). At
> that point, the report was stuck at the same values for maybe 30 or 40
> minutes, until ACPI eventually reported a "battery is seriously low"
> event. Then, it started to report actual data (battery voltage,
> current draw) again.
> Alas, the reported values now are still way off:
> remi# acpiconf -i0
> Design capacity: 791 mAh
> Last full capacity: 791 mAh
Three or four cycles of charging / depth depleting may recalibrate the
internals and reported values may become more appropriate.
You should not stop the discharging prematurely - it affect the results.
If you run notebook mostly on AC adapter so the battery is never
discharged so much then internal circuits become confused about battery
capacity. It's common behavior - nothing special to notebooks.
More information about the freebsd-acpi