I bought last week a 13" MBP (2,40 GHz) and I'm very happy with it. Okay, sometimes I think it could be a little bit faster, but all in all I'm happy. But there is just one thing ... My battery lifetime is far away from 10 hours. I reinstalled os x and I only get around 6 hours battery lifetime. People from here and other forums writing here, that they get easily up to 10 hours and more (or the battery information shows 10 hours and more). This is impossible for my macbook pro. What could be the reason? I'm not a noob, there's no cpu killing process in the background. The battery health status is fine.