I have my screen on full brightness, graphics on auto switching, 40% time DVD use and 60% web surfing. I could only use the 2010 15" 2.66 i7 MBP for 4 straight hours which is way below Apple's advertised time of 8-9 hours. Are you all experiencing about the same battery time as me? People I know with a 2010 13" MBP doing about the same activities as me are experiencing much longer battery time, around 7 hours. Just want to know if I have a "bad" battery and whether I should bring it in to Apple to have them look at it. Anybody know what they would do? Guessing they would run some battery software test, and then tell me my battery is not defective.