I just bought a 2011 13" base model MBP yesterday and noticed that the battery life drains way too fast. I'm doing light web browsing and iChat (not using cam) on about half backlighting and it seems like the percentage is dropping every 5 miniutes... Am I being paranoid or what?? I even left the macbook on with the display on sleep and while downloading star craft 2 at 300kb per sec and it died 5 hours later when i came home. Is this normal??