I have to say, I'm really impressed with the iPhone 5 battery life so far. Yesterday I had a bunch of standby and well over 6 hours of usage, including cellular browsing, games, downloading apps and benchmarking. Still had about 18% left. Today, I've been using the phone now for almost 2.5 hours and I'm still only down to 77%. That's on pace for over 10 hours of usage (not counting the standby time.) Really nice for a lighter, thinner phone with a bigger screen.