Hey Everyone, I had a puzzling thing happen this morning. When I woke up, my iPhone was very hot--not just the warm it gets from charging or using Safari--it was hot enough to surprise me when I reached for it. The other weird part is the battery had less than 20% charge remaining. When I went to sleep (5 hours prior), it was almost completely charged (I had it on the dock much of the previous day), but I left it connected to the charger when I went to sleep anyway. Has this happened to anyone before? Should I be concerned about this? Thanks in advance.