On Fri, 17 Feb 2006, Micha Feigin wrote: > If the battery is Li-Ion then their nice due to relatively high capacity and > presumably no memory but they have a lifespan of about two to two and a half > years without regard to usage (storing them half charged when not used is best > though).
T20s have Li-ion inteligent batteries. Hmm, if you use them exactly the wrong way (keep them inside the laptop where it is warm/hot, and fully charged to capacity almost all the time, and always do full-drains for some stupid reason), they won't last even one year without degrading to half capacity, pehaps worse. Storing Li-ion at ~15C (well don't go below 10C, if it freezes, you may need a new one...) with 40% charge should let them have a better shelf-life. They will still degrade, and you must take a look on the charge from time to time, because if it gets too low... I must find out what to do with Li-polymer batteries, though :( The one I have didn't handle the storage at 15C very nicely (depleted all of its charge). > One of the problems (although this can also be viewed as a good point) > with IBM is that they run constantly through the battery and not directly > of the input power. At least newer ones don't work without the battery > even if you have power. This is done for surge protection and to function > as a UPS AFAIK but This does not hold true for my IBM/Lenovo ThinkPad T43 (model 2687), and that's a reasonably new machine (launched 2005-02). What machines exibit the behaviour you describe? > I am not sure which system the t20 uses but if its acpi (check if you > have /proc/acpi/battery/BAT1/info) then its not debian thats reporting the > battery state. I'm not sure how apm works. T20 has ACPI (according to thinkwiki.org), but it probably has APM as well. > I just replaced the battery on my laptop that after three years started > lasting 25 minutes on a charge. Now the new one reads > > design capacity: 65140 mWh > last full capacity: 76560 mWh > > Strange hah? Is it brand new, or was it reconditioned? 10Wh is a lot of capacity to deviate from the design predictions... -- "One disk to rule them all, One disk to find them. One disk to bring them all and in the darkness grind them. In the Land of Redmond where the shadows lie." -- The Silicon Valley Tarot Henrique Holschuh -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
