[ltp] T42p + Battery Rundown and results

[Timothy Murphy]

On Sunday 17 February 2008 02:26:19 pm Henrique de Moraes Holschuh wrote:

> On Sat, 16 Feb 2008, David A. Desrosiers wrote:
> >> That's about the worst thing to do to a lithium battery.  They like
> >> frequent, top up charges, not deep discharge and full recharge.
> >
> > Frequent, top-up charges is precisely what killed their capacity over
> > time, verified by what IBM themselves told me about the issue when I
> > spoke to them on numerous occasions over the last 2 years about it.
>
> Indeed.  Keep the battery in the [30%,85%] charge interval.  Stop charging
> when it goes from burp charge (yellow led) to tickle charge (blinking green
> led).
>
> But it *will* still be at 50% original capacity after two years, unless you
> live in a very cold climate (when it won't work right anyway, soo... :) ).

I've seen so much contradictory advice on this subject,
but very little if any experimental evidence.
I begin to suspect that batteries will last for much the same time
whatever way they are treated.