tuxebi at gmx.de
Sun Jan 21 19:24:50 UTC 2007
Paul Kaplan wrote:
> On Saturday 20 January 2007 4:23 pm, Mario Vukelic wrote:
>> On Sat, 2007-01-20 at 15:49 -0500, Paul Kaplan wrote:
>> > On Saturday 20 January 2007 3:30 pm, Mario Vukelic wrote:
>> > > On Sat, 2007-01-20 at 15:04 -0500, Paul Kaplan wrote:
>> > > > How can I tell how much charge my laptop battery has when full?
>> > >
>> > > On Ubuntu 6.06 (Dapper) and 6.10 (Edgy) you should be able to unplug
>> > > and then see a battery icon in the notification area (I can't
>> > > remember how it was in earlier versions). Hover the mouse cursor over
>> > > it and it should show you the remaining time. If you don't see the
>> > > battery icon then go to menu System/Preferences/Power Management and
>> > > configure when the icon is shown.
>> > I was looking for something more technical. I'm trying to figure out
>> > whether the battery is loosing it's ability to hold a charge or whether
>> > it's just discharging very rapidly.
>> I see :) Poke around in /proc/acpi/battery/*, using cat on the cmd line.
>> I don't know what exactly to do with the info there, but it might give
>> you hints. E.g., on my laptop:
>> cat /proc/acpi/battery/C1B1/info
>> present: yes
>> design capacity: 4659 mAh
>> last full capacity: 4659 mAh
>> battery technology: rechargeable
>> design voltage: 10800 mV
>> design capacity warning: 233 mAh
>> design capacity low: 47 mAh
>> capacity granularity 1: 100 mAh
>> capacity granularity 2: 100 mAh
>> model number: Primary
>> serial number: 00719 2006/09/04
>> battery type: LIon
>> OEM info: Hewlett-Packard
>> cat /proc/acpi/battery/C1B1/state
>> present: yes
>> capacity state: ok
>> charging state: charged
>> present rate: 0 mA
>> remaining capacity: 4496 mAh
>> present voltage: 12257 mV
> As I suspected...
> design capacity: 47520 mWh
> last full capacity: 14910 mWh
> Will cycling the battery from full to discharge 2-3 times restore the
> to charge to design capacity? Is there anything else I might try or am i
> destined for a replacement?
you are most likely destined for a replacement, since modern batteries very
rarely react positively on power cycling. However you can always try.
If you try, you better try hard. I found the very old compaq battery
calibration tool invaluable for this.
you should get this or something similar by googling for "laptop battery
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