I was shocked after downloading 7.0.2 at the increase in battery drain on my 4s. 6 hours was it, using the same settings I had on iOS 6. Down loaded 7.0.3 under the supervision of Apple customer support; killed the sims and had to get a new 4s through Verizon under my extended warranty.My battery life is greatly reduced. I go through 5% every 5 mins. In 2 hours, the battery is dead. All started after 7.0.3. Guess a trip to Apple is needed.
My new phone came with the iOS 6, same settings and right now I'm at 16 hours with 60% left.