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
