Well guys This is my first post on macrumors so hello everybody. I bought a macbook air just over a month ago and am loving it. Last week i let the battery run until the computer shut down and since then it is taking me 8 plus hours to recharge the battery. Before that it was not taking any longer than 4 hours. I'm worried that battery may be permanently damaged. Is emptying the battery completely of charge bad ? Thanks for the help.