iPhone 4 16 GB Black Current iOS: 5.0.1 Here is the thing I do not have any problems, and my battery life seems fine already. I charge it to 100% before bed, and unplug it. When I wake up I typically am at about 97%. So I lose 3% over 8 hours in standby. I think this is pretty good, and I am afraid to risk the upgrade and lose what I have. I see some people are having improvements, and than a lot of "5.1 ruined my battery" threads. Is anyone in the same boat as me?