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 > charged.
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 problem. -- derek -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
