[ltp] Running without a battery?

[Theodore Ts'o]

On Thu, Jan 15, 2004 at 11:21:20AM +0100, Uwe Walter wrote:
> On Mi, 2004-01-14 at 10:50, Dr. Jason Breitweg wrote:
> > I have a a TP240 and just got a new battery for it.  I read somewhere that
> > the best way to keep the batteries life long is to charge it fully then
> > use it until it is almost fully uncharged and then charge it and so on.
> 
> Not with Li-Ion any more:
> 
> http://www.batteryuniversity.com/parttwo-34.htm
> 

This is definitely an interesting article, which I urge everyone to
read. 

The one thing which I'm not convinced about was the recommendation not
to use a battery while on AC mains, since the battery temperature
rises when fully charged.  I was fairly sure that on modern Thinkpads,
once the battery is fully charged, the charging circuit disengages,
and no power is applied to the battery until it has been discharged
below 95%.  Hence, it would seem that the battery should not be
getting hot once it is fully charged and the laptop is running on AC
mains.  Can anyone confirm this?

						- Ted