Hi, so i just got my 13'' macbook pro 2.4ghz 256gb 8gb ram and to my dissapointment the battery indicator for this guy only shows about 6 hours of battery life after a full charge. now, when theres 74% left, battery indicator is showing 4:30 left. Apple promised 9 hours and i was hoping to get at least 7-8 hours of battery. I'm only doing stuff on pages and some web browsing...shouldnt i get that amt of battery life at least? My screen brightness is 5 bars. Hoping someone would give an answer to this. thanks a lot!!!