Just wanted to give people a heads up if you are having problems with your iPhone 5S' battery life. I had my phone for 3 weeks. My battery would drain from 100% to 85% in a hour being on standby. I contacted Apple and they asked me to do a factory restore without backing up my info. I did everything they asked me for, even turned off my push notifications with little results. They said that there was nothing wrong with my phone and for me to wait for the next update. WRONG! I insisted until they replaced my 5S. Well I'm happy to say that my battery is now going from 100% to 98% in an hour on standby. My 5S was brand new and it was draining fast. Apple seems to disregard the fact that there was something wrong with that battery. After following all their demands, I was still having problems so why make my life difficult? If you are having problems with your battery and your phone is new; request them to give you a replacement even if their diagnostics say otherwise.