battery state - hw.acpi.battery.life goes only down

[Michael Schuh]

2012/9/26 Brandon Allbery <allbery.b at gmail.com>

> On Tue, Sep 25, 2012 at 7:43 PM, Michael Schuh <michael.schuh at gmail.com>wrote:
>
>> this wrong number seems persistent during a reboot.
>> i tested this, shortly.
>> the battery life after reboot was 97% with power supply plugged in all the
>> times.
>>
>> after a clean boot the system camed up with a battery.life of 97% ( power
>> supply plugged in :O ).
>>
>
> Sounds like normal lithium ion charger behavior to me; typically they
> won't kick in the charger until it reaches somewhere between 90-95%
> (depends on the device).  This extends the useful life of the battery; raw
> lithium ion is just as (actually, more) prone to destruction via
> overcharging as other battery technologies.
>
> http://batteryuniversity.com/learn/article/charging_lithium_ion_batteriesdiscusses this.  Note in particular:  "A continuous trickle charge would
> cause plating of metallic lithium, and this could compromise safety."
>
> --
> brandon s allbery                                      allbery.b at gmail.com
> wandering unix systems administrator (available)     (412) 475-9364 vm/sms
>
> hmm, may be.
i didn't thinked about that lithium charging feature.
you may right with that.
but one point, this behaviour is new.
i made some tests to check if my conkyrc is right and there i haven't wait
that the battery is gone under 90%
for checking this. after i could confirm that the conkyrc is syntactically
correct, the battery reached 100% again.
that was before i updated the system last week.

i will check that out. under the load of a make world it should only take
minutes to get the battery.life under 80%.

many thanks for your hint.

-- 
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