BatteryOn the battery life front, all the three phones perform fairly.
Results show that the iPhone 5S just edges out the old iPhone 5. It's rated at 10 hours of talk time on 3G, while the iPhone 5 can only muster 8 hours.
Standby time is calculated to be 250 hours for the 5S and 225 hours for the iPhone 5. Average usage is much the same - 10 hours on LTE, up to 10 hours on Wi-Fi, up to 10 hours of video playback and up to 40 hours of audio playback.