Not sure if this is by design but I'm pretty sure it is not. I was hoping the IOS 6.1.4 update would do something to fix the battery life since 6.1 but no joy. I have done a full DFU restore and it worked for about a half hour. I loaded all my apps one by one over wifi rather than a restore. I have tried turning off all notifications, Bluetooth, deleting iCloud and all email accounts, turning off push etc. Even while on airplane mode if I'm staring at the screen the battery is dropping. No surprises there to be honest, only disappointment. Something new I discovered just today while banging my head on the desk and staring at the usage screen, I noticed the standby time increasing while the normal usage also increasing. The numbers are not the same. The phone does feel warm all the time. Any thoughts? I think I will try another DFU restore and maybe an apple store visit.