OK I have heard many things about leaving my computer plugged in. One said that Macs do not over charge another said that computer made after 2001 do not overcharge and shut charging of. This I know is untrue because I had a 2008 Sony Vaio and I left it plugged in and the battery would only hold a charge for 5 mins after the fact. So are macs special? Do they stop charging after 100% and my Magsafe cord turn green? I don't want to worry about my battery.