Last night before I went to bed, I had about 90% battery and my usage was about 1.5 hours. This morning my battery was about 30% and my usage was 8.5 hours. I had set an alarm. This is the second time this has happened, I had no idea what caused it the first time, but I think I've figured out that the alarm clock is running in the background. original 8GB iPhone, WiFi off, and my email doesnt auto-check. Anyone else have this problem, or know of a way to fix it?