Like others, I'm not getting good battery life. My first battery gave me a best read of 5:15 with everything off except for wifi and brightness at 50%. Apple replaced the battery, I've calibrated the new one like the first and it's reading 5:30. I can't even get it to show me 8 hours for a second which is really starting to piss me off. I doubt I have had two defective batteries so I'm wondering if my issue is hardware or software related. Should I try and get Apple to replace the computer? I realize Apples listed times are not 100% accurate, but an idle computer with nothing but safari open should read better than 5:30. Plus there are many people here listening much better battery times than mine so I know the exist.