This is for the battery experts: Call me paranoid but I'm just worried I ruined my brand new MBA's batteries by doing a calibration. Nothing unusual about my batteries at the moment, still getting around 4-5 hours in real battery life per charge (only charged it once since I bought it). I'm surprised the new MBA batteries have already been pre-calibrated in the factory, as Apple's 'additional information' states. Too bad I didn't read this. What do you think?...please ease a paranoid mind.