Re: Battery life
On Monday 21 March 2005 13:15, Jan T. Kim wrote:
> On Mon, Mar 21, 2005 at 10:39:19AM -0500, Steven wrote:
> > Huh! And I was advised the opposite recently by a fellow tech.
> > He claimed leaving the battery in and constantly charged would result in
> > longer battery life span.
> If I recall correctly, the question is to which extend the battery is
> kept charged, and in what increments. The c't story was:
> * for longest life, batteries should be charged to 80% of their
> capacities. Apparently, notebook manufacturers sometimes keep
> stocks of batteries that they keep charged at that level, to be
> sold as replacements when the model is no longer made.
> * deep, total discharge of the batteries must be avoided
> * the number of re-charges should be minimised
> * exposing the battery to higher temperatures, such as those in a
> working notebook, accelerates deterioration
> * temperature induced deterioration is worse if the battery is fully
Unfortunately information on the best ways to treat batteries is often
contradictory. My laptop came with instructions to store unused batteries at
40% charge, and I've heard that deep discharge of L-ion batteries is not a