lubuntu-qa team mailing list archive

[Phill Whiteside <PhillW@xxxxxxxxxx>]

IIRC,

when the battery is charged the charging stops (this stops the battery from
exploding!). When charging is turned off, the laptop will run on battery
power for a short while and once the battery is not 100% full (as you say
~95%) the charger re-engages.

I see this when I charge my mobile phone, it will charge... the charger
will then indicate that the phone battery is fully charged and change
state. A few hours later, it will then re-engage to charge the phone.

I'll have to take a check of actual charge on my laptop battery, but I know
that after ~3 years Ni-MH battery packs are approaching the end of their
life.

For more technical details of how charging Ni-MH batteries takes place, I
suggest having a read of
http://en.wikipedia.org/wiki/Nickel%E2%80%93metal_hydride_battery#Charging

As I understand it, laptops and mobile phones use the 'fast charge' method,
which requires some 'intelligence' on the side of the charging system.

Regards,

Phillw


On 6 December 2013 15:15, Lars Noodén <lars.nooden@xxxxxxxxx> wrote:

> > On 11/18/2013 11:07 PM, Phill Whiteside wrote: Hi Lars,
> >
> > mine doesn't spend too long unplugged from the power. But when I do
> > run it on battery it behaves as expected. I do have a nearly new
> > battery in piglet, as the other couldn't hold a charge (it was a
> > mis-used windows machine in its previous life). I've certainly no
> > problems getting an hour out of running at full power (no dim screen
> > etc).
> >
> > Regards,
> >
> > Phill.
>
> On several occasions I've been able to leave it plugged in over night
> and continue to use it while plugged in.  Even then the
> xfce4-power-manager periodically comes up with a notification that the
> battery is charging.  That usually lasts for a few seconds, during which
> it shows that batter at 0% or 95%.  After that pause it then goes back
> to a notification saying fully charged, and a check shows 99%.
>
> ACPI shows some fluctuation with design capacity and last full capacity
> over time.
>
> Regards,
> /Lars
>
>
>
>
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