Well, just to muddy things a bit, I have seen one or two thinkpads like yours, which were used a lot but didn't have that much battery deterioration.
Before my T60p was stolen, its battery had dropped by about 45%, over a years time; I wasn't good about using the battery as much as I should have been. --STeve Andre' On Monday 19 January 2009 17:16:21 Michael Stack wrote: > That's very interesting - I wasn't aware that trickle charging is always > taking place. In fact, I thought that when I set Power Manager to recharge > when battery was below 85% that meant no charging until that point. > > In any case, my T60 is powered on 24x7, except during occasional travel. > After more than two years, my battery's full charge capacity is still > almost 50 Wh (design capacity is 56.16 Wh). I rarely use the battery (only > during travel), but I prefer to leave it installed in case of power > failure. > > I suppose I should pay more attention to how fast the full charge capacity > declines over time. > > Mike > > At 04:31 PM 1/19/2009 -0500, STeve Andre' wrote: > >On Monday 19 January 2009 13:24:03 [email protected] wrote: > >> In <[email protected]>, on 01/19/2009 > >> > >> at 12:13 PM, Chris Schumann <[email protected]> said: > >> >STeve Andre' wrote: > >> >> If the disks are powered down and the LCD display is off, then you > >> >> could leave it on for months with no ill effects, *if* the battery > >> >> is out. Absolutely no company does really correct battery charging, > >> >> so if the unit is on for a long time the battery is going to die. > >> > > >> >Just to stress this, only the battery will suffer from this. The rest > >> > of the machine will be fine. If you need the machine on, and the > >> > battery to be present for whatever reason, replacement batteries will > >> > be part of the cost. > >> > >> I've never had a problem leaving a battery in any Thinkpad. What are > >> you people talking about? > >> > >> >Chris > > > >The battery is trickle-charged when you are using AC power. If you use > > the laptop for long periods of time and never use the battery, you will > > find that the battery doesn't have as much life as it should, after say > > half a year or so. I've seen this at work too, between those who use > > their laptops as portable desktops vs. mobile units powered by their > > battery. > > > >--STeve Andre' > >_______________________________________________ > >Thinkpad mailing list > >[email protected] > >http://stderr.org/cgi-bin/mailman/listinfo/thinkpad _______________________________________________ Thinkpad mailing list [email protected] http://stderr.org/cgi-bin/mailman/listinfo/thinkpad
