Hello all, I just bought a new MBA Rev. B 1.6Ghz 120Hdd and I am new to the MBA. I don't know about you guys but my battery just take at most 2:20 hrs and I don't understand what drain it so much . I am a long time user of macrumors forums and many of you guys have macbook airs that take more than 4 hrs. I am using bluetooth and wifi and half dimmed screen, usual usage is Web Surfing, and working on office documents. How can I figure if it's a problem coming from the hardware or my mac os doesn't show me the proper information about the time remaining ? Thanks in advance for your advice .