[ltp] One battery or two?

Michael Gaber linux-thinkpad@linux-thinkpad.org
Mon, 06 Oct 2008 23:13:44 +0200


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Tino Keitel schrieb:
> On Mon, Oct 06, 2008 at 16:23:04 +0200, Michael Gaber wrote:
>>> [...]
>>> And when I use it, I try to use it in a way that
>>> implies at least charge cycles as possible.
>>>
>> If my undestanding is correct (as the apple page told me once) a charge
>> cycle is a full charge of 100% capacity, so if you use your battery from
> 
> AFAIK this is not correct. The battery is stressed mostly during the
> last few % of the charge cycle, until it reaches 100%. So it doesn't
> matter if you charge from 10% to 100% or from 70% to 100% (or, at least
> charging from 70% to 100% isn't only one third of the harm than
> charging from 10% to 100%). That's also the background of Henrique's
> hint to avoid the last 5% of a charge cycle, and to set
> stop_charge_thresh to 95 or lower.
> 
> I used a T23 a while ago. I always tried to keep the number of charge
> cycles low, which worked well regarding the remaining battery capacity.
> Then I started to travel by train, with unreliable power sockets so I
> had to keep the battery plugged in. The short power outages lead to a
> few % of power drain, resulting in at least one charge cycle per trip.
> The T23 doesn't support the TP SMAPI settings, so I couldn't do
> anything about it. After a few weeks, the capacity of the battery was
> reduced by nearly one third, and reduced further after each trip.
> 
> Regards,
> Tino

if you would've read my whole post i said that regarding to CYCLES it
doesn't matter if you do 0->100 or 3x33->66, but regarding to STRESSING
the battery it is recommended to let it neither charge to 100 nor drain
to 0. That's why i have my settings at 30/70 which keep me nicely safe.

Regards,
Michael

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