My iPhone 5, which is a pre-order from last year, has literally the worst battery life I've ever seen. I have a new replacement a battery on order (since I fix my own stuff), but I don't understand why it's this bad. This usage has been on wifi, and I have a ton of stuff turned off. I know everyone will suggest restore from new but that is not an option for me. My friend also has a iPhone 5 with similarly bad battery life. I have a mophie I use and get probably 3 hours of device usage in total with the mophie and the devices battery.