Finally got my rMBP today and charged it upto 100%. Now I am at 97% battery and only 5 and a half hours left...!? The Apple website said 7 hours which I would be fine with, other sites even hyped it up saying it showed 9+ hours. Mine is far from this and all I am doing is browsing the internet. What kind of battery life does everyone else get? What could I be doing that is draining my battery? Could I have received a crap battery?