Here it goes... So I got my MBA on Monday and have charged it a few times since, including battery calibration, system management controller reset, etc. I used it down to 20% today, turned it off, and plugged it in. When I turned it on 3 hours later, it was only at 45% and said 5 hours till full. Then, 10 minutes later, the computer has charged up another 5% and now says 1 hour 30 minutes till full. It SEEMS that it charges faster when it is on. Is this possible??? What could be causing such weird charging issues?