I truly do not understand how can Apple get up to 8 hrs from this "special battery" when all I get is 4 hrs. I know usage, screen brightness, wifi etc do make a difference with the battery life. After going to Apple's website and reading the small print at the bottom of the page that states: The wireless productivity test measures battery life by wirelessly browsing various websites and editing text in a word processing document with display brightness set to 50%. I did just that, in fact, I reduced the screen less than 50%, used iWork instead of Office and browsed websites without video and I got 4 and a half hours of usage, that is almost half than what they advertise. So basically if they tell me that the battery can get up to 1000 cycles it means that I will get 500 cycles out of it if I am lucky? Not right! Apple gets sued back and fourth for their false advertisements and they still keep on doing it? Same thing with the iPhone, iPods etc... What do you guys think?