Hi guys, I've been thinking to buy macbook air gen2 this month sometimes,however I am concern about "how long the battery last on mba gen2"? At the moment I owned Ibook 12'' G4 the battery still have a good one, around 4 or 4.5 hours, I also have second backup battery, so total is around 8 or 9 hours battery a day. I am kind of mobile person, I need apple laptop that can last longer on battery. Any sugestion on battery for MBA gen2? I've read alot here in forum about MBA, but I just want to focus on "battery" nothing else. Should I buy this MBA? or not If the battery last longer only 2.5 hours or top one is 3.5 hours any solution on this? to make longer?