How do people manage their MB batteries? I know with rechargeables, it's best to use the power up before doing a full charge. Although not as critical as it once was, that still seems to be best practice. My question is, what about leaving it plugged in? The battery on my Dell laptop for work just went unusually quickly (got about 11 months before the battery wouldn't hold a charge), and I was told I shouldn't keep it plugged into the wall all the time, but should make sure I let it drain and recharge from time to time. And what about unplugging from my home office, and walking over to the living room and plugging in there. Does that kick off a charge "cycle?" Someone told me MB batteries are good for about 300 "cycles" but I'm not entirely sure what that means. How do you manage your battery, and is it OK to leave it plugged in a lot?