battery display broken

[Oliver Pinter]

Some others have problem with HP laptop and freebsd battery indicator.

kern/162859: [acpi] ACPI battery/acline monitoring partialy working (switching)


On 12/16/11, Ian Smith <smithi at nimnet.asn.au> wrote:
> On Fri, 16 Dec 2011, Dominic Fandrey wrote:
>  > It seems something broke with the battery display. Last night it
>  > showed 94% remaining capacity for more than 2 hours.
>  >
>  > Afterwards I docked the machine (HP6510b) and rebooted it. Since then
>  > more than 8 hours have passed, but it still shows 16% (the LED indicators
>  > state that the battery is full and no longer charging).
>  >
>  > # acpiconf -i b
>  > Design capacity:	4703 mAh
>  > Last full capacity:	4703 mAh
>  > Technology:		secondary (rechargeable)
>  > Design voltage:		10800 mV
>  > Capacity (warn):	236 mAh
>  > Capacity (low):		48 mAh
>  > Low/warn granularity:	100 mAh
>  > Warn/full granularity:	100 mAh
>  > Model number:		Primary
>  > Serial number:		00835 2010/01/05
>  > Type:			LIon
>  > OEM info:		Hewlett-Packard
>  > State:			charging
>  > Remaining capacity:	16%
>  > Remaining time:		unknown
>  > Present rate:		3351 mA (39585 mW)
>  > Present voltage:	11813 mV
>
> At least four things can go wrong.  The battery charging circuit might
> be broken (my first T23 failed that way after 5 years); the battery
> might just need 'conditioning' (discharged to exhaustion, beyond normal
> low-battery shutdown, then fully charged - perhaps twice), to reset its
> internal Coulomb Counter; the CC chip may be faulty; or the battery
> itself may be failing / have failed, usually one cell first.
>
> Is the battery hot at this stage?  If that 'Present rate' is correct, a
> 3.35A/39.6W charge should tend to overheat the battery over time, if
> charging continues beyond full capacity, which may indicate a bad cell.
>
> 11.8V seems too low for a fully-charged 10.8V nominal LIon battery.  I
> have several 4.0 and 4.4Ah like the below, which charge to ~12.4V, and
> only get down to 11.8V while discharging, at around 85% nom. capacity.
>
> Interesting that your LEDs display a different view; perhaps BIOS + EC
> just monitors voltage and cuts charge, but then what's reporting that
> fairly high charge rate?  I'd expect the Embedded Controller to be doing
> that .. any dmesg indications of ACPI problems talking to the EC?
>
> The 16% is likely from the battery's onboard coulomb counter, but then
> so might be the (bogus?) charge rate report.  All speculative, I know ..
>
> # acpiconf -i 0		# Thinkpad T23, 8.2-R, older but ok battery.
> Design capacity:        43200 mWh
> Last full capacity:     31850 mWh
> Technology:             secondary (rechargeable)
> Design voltage:         10800 mV
> Capacity (warn):        2160 mWh
> Capacity (low):         432 mWh
> Low/warn granularity:   1 mWh
> Warn/full granularity:  1 mWh
> Model number:           IBM-02K7026
> Serial number:            932
> Type:                   LION
> OEM info:               Panasonic
> State:                  high
> Remaining capacity:     100%
> Remaining time:         unknown
> Present rate:           0 mW
> Present voltage:        12386 mV
>
>
>  > The chipset is Intel 82801 from the ICH8 family. I'm running
>  > RELENG_9/amd64.
>
> All that said, I don't know specifically how HP do things, or what
> normal full charge voltage is expected.  Tried another battery?
>
> cheers, Ian
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