On Wed 24 May 2017 at 11:12:36 (-0400), Fungi4All wrote:
> On 28/03/17 16:24, David Wright wrote:
>
> > Charger in:
> > POWER_SUPPLY_CHARGE_FULL_DESIGN=3800000
> > POWER_SUPPLY_CHARGE_FULL=872000
> > POWER_SUPPLY_CHARGE_NOW=3800000
> >
> > Charger out:
> > POWER_SUPPLY_CHARGE_FULL_DESIGN=3800000
> > POWER_SUPPLY_CHARGE_FULL=872000
> > POWER_SUPPLY_CHARGE_NOW=828000
> >
> > IOW my baseline after 8 years is about 20% capacity.
>
> I think at that state it is 95% (828/872) and I think these correspong to
> 8.28v and 8.72v which is as good as new.
I think you've misread the labelling here: charge, not voltage.
This "good as new" battery yields the following:
2017-05-24-18-19-29 (timestamp)
POWER_SUPPLY_NAME=BAT0
POWER_SUPPLY_STATUS=Discharging
POWER_SUPPLY_PRESENT=1
POWER_SUPPLY_TECHNOLOGY=Li-ion
POWER_SUPPLY_CYCLE_COUNT=0
POWER_SUPPLY_VOLTAGE_MIN_DESIGN=11100000
POWER_SUPPLY_VOLTAGE_NOW=11968000
POWER_SUPPLY_CURRENT_NOW=1372000
POWER_SUPPLY_CHARGE_FULL_DESIGN=3800000
POWER_SUPPLY_CHARGE_FULL=1032000
POWER_SUPPLY_CHARGE_NOW=998000
POWER_SUPPLY_CAPACITY=96
POWER_SUPPLY_CAPACITY_LEVEL=Normal
POWER_SUPPLY_MODEL_NAME=DELL JG1688
POWER_SUPPLY_MANUFACTURER=Sanyo
POWER_SUPPLY_SERIAL_NUMBER=770
Charge: 96%
2017-05-24-18-42-30
POWER_SUPPLY_NAME=BAT0
POWER_SUPPLY_STATUS=Discharging
POWER_SUPPLY_PRESENT=1
POWER_SUPPLY_TECHNOLOGY=Li-ion
POWER_SUPPLY_CYCLE_COUNT=0
POWER_SUPPLY_VOLTAGE_MIN_DESIGN=11100000
POWER_SUPPLY_VOLTAGE_NOW=10604000
POWER_SUPPLY_CURRENT_NOW=2036000
POWER_SUPPLY_CHARGE_FULL_DESIGN=3800000
POWER_SUPPLY_CHARGE_FULL=1032000
POWER_SUPPLY_CHARGE_NOW=55000
POWER_SUPPLY_CAPACITY=5
POWER_SUPPLY_CAPACITY_LEVEL=Low
POWER_SUPPLY_MODEL_NAME=DELL JG1688
POWER_SUPPLY_MANUFACTURER=Sanyo
POWER_SUPPLY_SERIAL_NUMBER=770
Charge: 5%
So that's a loss of 91% charge in 23 minutes. The reviewer of
this machine reported a battery life of over 200 minutes.
The large (400 minute) version of this battery went through a
similar course of gradual failure, except that one or more cells
started to go bad:
Feb 2014: laptop power lights started to beat a tattoo, indicating a problem.
Jul 2014: full capacity down to about 30% of the design maximum.
Mar 2015: total failure; battery power lamps flashed 1 3 5 when pressed.
I've never seen a non-linear pattern documented, either for
the short or the long press.
Both batteries date from at least 2009 so I can't really complain.
Cheers,
David.
