So although 5-6 hours of battery is not uncommon for a MBP running OSX, when you get windows on there, it goes down to 90 mins. Most people (inc me) believe this is not a failing of windows, but a result of poorly written drivers not utilizing the hardware correctly. It doesnt look like apple will ever write decent drivers for their hardware for use with windows. So, im wondering are there any projects to get decent drivers for apple hardware for use under windows? even if you didnt get the full 5-6 hours, it should still be easy enough to get 3-4 hours from a mac on windows.