Very bad battery life on iPhone 4S after iOS 5.1.1 update
I have an iPhone 4S. I bought it with iOS 5.0 on it. Then I upgraded to 5.1, then to 5.1.1. Prior to 5.1.1, I had excellent batery life, just like Apple describes it on its website. Now on 5.1.1, which I just installed 1 week ago, I have absolutely terrible battery life. I get about 3% battery drain per hour on standby. When using it, i get 1% drain every 2-3 minutes, on any app.
I have tried restoring it to factory defaults, then restoring it back to my backup, 2 times, yet still no difference. I am not a heavy user. It seems that my problems started right after 5.1.1. Anybody have any solutions to this, or is anybody expriencing the same problem?