My battery life is sucking. All the same things on that I kept on my 4S. Even with cellular data off and Siri disabled I'm only getting 8 hours of "standby". With my 4, I kept it on "EDGE" unless I needed faster data, kept bluetooth running in the background and WIFI on. If I used the phone moderately between 5:00 am and 9:00 pm I could be at 60%. If I used it very little I'd be above 90%. VERY disappointed with the 4S and may return it.