05-12-2010 03:02 PM
if you just leave the battery installed in your laptop it won't damage the battery, provided it is not constantly draining and recharging.
The battery will get damaged after around 300 to 500 charge cycles. So just set the battery to charge below 50% and stop charging at 95%.
05-12-2010 11:52 PM
Yeah, that's the beautiful thing about Lenvo--you can set custom charging thresholds in Power Manager so that you can minimize the battery "damage" when you are almost always plugged into a power outlet. However, if you really DO want to work without the battery, the 90w power adapter will give you the good performance, like a battery with the 65w adapter.