Last night at work, I left my 3G connected to the USB wall charger starting at around 1am. I got off at 8am and took my phone off, went home and went to sleep. (didn't use the phone at all). I woke up this morning at around 11am and noticed that I had received ONE text message, and also that my battery was at 10%. What is going on? This is my THIRD iPhone 3G. The first one I got replaced because it had a cracked plastic shell on the bottom. The second one I got replaced because it had black lines on the screen while on lock, dust under the screen, light leak, and scratches on the metal bezel. Please tell me I don't have to go back to the store again. I'm sick and tired of this BS. Anyways.. did anyone have something like this happen on their first full charge? Some say that battery calibration will be complete only after a full charge runs out to 0%, and I've done that with my other Apple products in the past. Never did any batteries run out THAT fast on a full first charge.