If anyone's holding off on the iOS 6.1.1 update for iPhone 4S, wait no more - the update has worked wonders for battery life.
I went from 100%-66% (1h 30m/14h 5m, 6.1) to 100%-88% (1h 24m/14h 5m, 6.1.1).
I went from 100%-66% (1h 30m/14h 5m, 6.1) to 100%-88% (1h 24m/14h 5m, 6.1.1).