Today I was letting my battery go all the way down and then recharging it, since I heard that helps keep the battery healthy. I unplugged it, left for a few hours, and when I came back it was dead. Usually when I do this, it goes to sleep and when I plug it back in it starts back up where I left off. This time, when I plugged it in, I received no response. I kept pressing buttons and left it plugged in for about three minutes and nothing happened. Then, I held down the power button until it turned off. After it turned off, I pressed the power button again to turn it on, but it wouldn't even power on. It was plugged in and charging (the red light was on), but it wouldn't even turn on. I tried this with the battery in and then I took the battery out as to run on just the power charge, but the MBP still wouldn't turn on. It finally did turn on, and it seemed to be frozen on my screensaver. I had to turn it off (again, even though I had already turned it off) and restart it. When I did, the battery charge was at 8%. So basically...has this ever happened to anyone? I have no idea why it wouldn't turn on when I plugged it in. I have AppleCare...should I call them? Anyway, any advice or help would be appreciated. Thanks!