Wirelessly posted (Mozilla/5.0 (iPhone; CPU iPhone OS 5_0_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A406 Safari/7534.48.3) I've kept running applications to a minimum and disabled Siri. I took note of how much battery was left when I turned it and how much it was when I woke up. It was probably 9 hours in between. Is this normal? 26% is quite drastic!