This has happened twice. Yesterday and just now. Im really worried, especially since my warranty was up in June. I just got my iPad out of my brief case and it was very warm and the battery was completely drained, well, down to 5%. it was 100%, or damn close! What's going on? And yes both times I was out in the field and using 3G and then put it away ~ Did it get stuck on 3G and not shut off, so it overheated and drained the battery?