got a new laptop. its mainly going to be left on my desk, but I got it to take on trips, instead of just getting a regular cpu. is it ok to leave is plugged in to the wall all the time? I know this sounds like a stupid question, but I thought I heard something about it will mess up the battery, and that maybe I needed to take the battery out if I left it plugged in all the time. anybody heard anything like this, run into any problems leaving their laptop plugged in all the time?