Hi guys, yesterday i just bought new macbook pro 15 inch model, and i never had any laptop or mac, so I am asking you how should I charge my macbook pro? I will use mbp at home for internet and other stuff and for djing in clubs, so I asked seller and she told me that I shouldn't have power supply connected to my mac and I should always wait until buttery gets empty because macbooks have own charging cycle, is this true, and please advise me when should I use power supply and when not. Thanks in advance! P.S. Do I have to calibrate my buttery, and is using utorrent harmful for macbook?