On Fri, 12 Dec 2008 14:10:35 -0500 Celejar <cele...@gmail.com> wrote:
> On Fri, 12 Dec 2008 13:20:03 +0200 > Micha Feigin <mi...@post.tau.ac.il> wrote: > > ... > > > Not completely, what newer batteries hate is heat, over and under charging. > > If it's always plugged in it may kill the battery rather quickly. What I > > have on my current thinkpad is the ability to stop charging before 100% and > > that can add quite a bit of like to the battery. > > Thanks for the information. I've been using my laptop for about two > years, for an average of probably several hours of power-on a day. The > design_charge is 2000000, and the current / now charge is 1792000, so I > suppose it hasn't degraded too badly yet. This is, I believe, a bottom > of the barrel battery, on a rather low end system, which I guess also > means less power draw, although my understanding is that the Celeron > has crippled power management. When new, I got a fairly consistent 1.5 > hours till shutdown, and I haven't done a drain test recently. > > You mention overcharging; as Ismael says in another message in this > thread, the system seems to know when the battery is full and stops > charging; the power LED goes from red to green, and ACPI reports > "full", not "charging". Does it really keep charging, to the > detriment of the batter? > It depends on how good they built the circuitry. If the led changes color then I guess that it actually stops charging. The issue is like this, battery charge percentage isn't an exact value, to make sure that you are at a 100% you need to over charge it and see that it stops there. If you stop at approximately 80% you're not over charging. Apart from that, if you disconnect and reconnect again, you start charging again even if it dropped just to 99.5%. What I do is set a stop charge limit at 85% and a start charge limit at 75% so it doesn't immediately start charging again. The problem is that this is possible only with newer thinkpads AFAIK. > Celejar > -- > mailmin.sourceforge.net - remote access via secure (OpenPGP) email > ssuds.sourceforge.net - A Simple Sudoku Solver and Generator > > -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org