[ltp] Re: ThinkPad Batteries

Micha linux-thinkpad@linux-thinkpad.org
Thu, 13 Nov 2008 13:29:54 +0200

On Thu, 13 Nov 2008 00:00:59 +0100
Elias Oltmanns <eo@nebensachen.de> wrote:

> "Daniel Castro" <castromd@tcd.ie> wrote:
> [...]
> > elias, you are the real thinkpad expert. what's you recommendation?
> I'm not, Henrique is ;-). He has already chimed in on this thread. Also,
> if you are interested, you can find other threads in the archives of
> this list where he explained these things in more detail.
> > my T61 is always at home sitting on the docking station, and i unplug
> > the AC when not in use.
> This will probably not work as expected. The settings configured through
> tp_smapi are persistent if either the machine is not switched off (s2ram
> is ok) or AC is plugged in. As soon as you shut the machine down and
> unplug it from AC, the factory defaults will be reset and the battery
> will be recharged the next time you plug in AC again.

That is not true. The settings are stored on the battery afaik since turning
off doesn't cause any problem. Not sure though about taking the battery out
when the machine is off, need to check that one.

> > should i leave the battery on and configure it to be 30%-80% with this
> > tp-smapi module or should i remove the battery (with ~60% charge) and
> > store it. i'm not so concerned about power outage, it would be like a
> > desktop without a ups....
> If you frequently unplug the machine from AC without actually working on
> it (e.g. to minimise over all power consumption or to protect against
> voltage peaks due to thunderstorms) and you are not concerned about
> power outages, I'd suggest you remove the battery. Otherwise, the
> settings above should be about right.
> Regards,
> Elias