Hi All, I'm going to get one of these bad-boys but having never owned an Apple notebook before I just wanted to ask; will leaving it connected to the mains damage the battery in any way? I read that you need to let it run off the battery every once in a while, is this true? Also, once it is running from the battery, should I let the battery run completely down before charging again? Should I avoid unplugging it for a couple of hours then charging, over and over? Thanks.