So my battery life on my iPhone 4 has become completely abysmal since I upgraded to the 4.1 OS. If I didn't use the iPhone at all during the day, I would get the end of the day with somewhere between 75 to 80% (and that's all day). Now, since the upgrade....I can watch the % drain literally while I sit there. it's down to 75% charge and it's only been 3 hours since a full charge. it's down to 15% by the end of the day. And this is with minimal to no use, no GPS usage, brightness turned down. Is anyone else having this issue? Should I take this into Apple and find out what'sup? Thanks for your help everyone.