Many users have taken to the Apple Support Communities (one of the many posts here) to cry about poor battery life after installing the iOS 7.1 update. The forums are loaded with complaints by users that would have wished they never installed the latest iOS update. Other problems reported seem to be related to crazy Bluetooth connectivity as well as random re-boots.
I asked a collegue with an iPhone 5s and he also complained about really crap battery life. Prior to the update to iOS 7.1 he didn’t experience such problems with battery usage. Post-update the OS could use up to a percent a minute (INSANE!). Let’s hope that Apple quickly releases iOS 7.1.1 to fix these battery and Bluetooth connectivity problems.
While we’re waiting for iOS 7.1.1 to go live, try doing a fresh installation through iTunes (instead of going the OTA route). Some have reported this to fix their problems with iOS 7.1.