Many people still are reporting issues with their battery even after upgrading to iOS 5.0.1. I happen to be one of these people :(. I called Apple Support. I would have a fully charged 4S battery at the beginning of the school day, and with very little light use the battery would be around 25-30% dead 7 hrs later, not at all close to the up to 200 hours Apple claims. Fortunately I have been able to make it through the rest of the day with a Zagg Sparq 2.0 and I really do love it. Apple recommends that I turn off all location services (or at least the ones I dont need), that I turn on automatic brightness. They also said that they recommend going into restrictions and disallowing ping. They said that there is something weird with ping that it can affect the battery life. I did all this so now I am just going to wait and see what happens!
You guys got any tips? be sure to leave a comment.