My Droid X recently dropped to a low enough battery level that it powered off by itself. I plugged it into a wall charger almost immediately, but since then it has been unable to power on. Now the green light indicator comes on steady, turns off, and then the Motorola symbol comes up and then goes away, and then the green light turns on again. Its been charging for about 45 minutes and I'm starting to get a bit worried. Is this normal or is there something wrong?