[ltp] advanced battery recharge management

[Paul Kaplan]

Speaking from experience, I agree.  I had both a TP600 and TP600x with a=20
LiIon.  Most of the time they were connected to AC.  The length of charge i=
t=20
would hold (under Win2K declined with time so that I had to replace the=20
battery on the 600x 5 times in three years.  I had a colleague with a simil=
ar=20
result on another 600x.  So LiIon bats do loose the ability to hold a charg=
e. =20
However, newer models don't seem to be as prone to the problem, perhaps=20
because the AC power supply is more advanced.  I now have a T40 and it too=
=20
mostly sits connected to AC, but in 1 year it hasn't lost much power. =20
Paul
On Saturday 25 September 2004 02:26 pm, Andr=E9 Wyrwa wrote:
> Hei,
>
> On Sa, 2004-09-25 at 18:19 +0100, Jan Kokoska wrote:
> > I don't think this matters with LiIon batteries (unlike NiMH or NiCd),
> > there is no "memory effect" as in "shrinking maximum capacity" anymore.
> > There is only "remember maximum capacity and don't go over this when
> > recharging" effect [0] and you are recommended to completely flush the
> > battery once in a while and completely recharge it afterwards, so it has
> > a clear idea of how much should it recharge next time (). For regular
> > use the recommendation is to recharge with 40% remaining with complete
> > flush once in a few months. This all applies to LiIon which is in all
> > recent models (I wonder where LiPol is hiding, though). I am sorry not
> > to include links to the research papers I read this in, as I kept no
> > links and you can Google it as well as myself.
>
> from what i've read, LiIon batteries loose capacity through permanent
> recharging when in almost full load state. This has nothing to do with
> memory effect. On that basis the option really affects battery life,
> since it avoids exactly that.
>
> Andr=E9.