A lot of people have been asking what the battery life will be for the Mac Book Pro. Seeing as how Apple has not been kind enough to post thier own results, I did some research and have reached some preliminary conclusions. Lets start with some pointers: A) 1.42 ghz G4 draws around 30 watts. (thanks Longofest) B) 1.83 ghz Core Duo draws 31 watts. Considering that the 15" PBG4 is 1.67 ghz one would have to assume that if anything the G4 Processor draws more power. On the other hand, the MBP has a 67% brighter screen, so there you go. I dont know the specs of the screen such as current draw (could someone find out?) but I assume it more than balances out. Then again, it may be an exponential situation where a little more power gives alot of brightness...? Anyway, assuming the current draw is similar for the two computers we shall, without further ado, proceed to the good part: 1) The 15" PBG4 uses a 50 W/h battery 2) the MBP uses a 60 W/h battery Soo... The MacBook Pro should get the same if not better battery life than the 15" PowerBook! I am guessing (hoping, praying) 5.5 - 6 hours of battery life.