There has been some member on here mentioning that older iOS devices are using battery faster than normal on current iOS. I can confirm this on my i7. I'm not a heavy user but have noticed this over the past week and a half. I'm going through a charge much faster than normal. I've never charged it at work before, never needed to but have had to sometimes now, borrowing a charger from a coworker. A full charge would get me through the day prior, easily. I stream Pandora a lot during the work day and maybe 15-20 minutes of you-boob, and then emails. And what is interesting is I just had the battery replaced at an Apple store several weeks ago so the battery in the phone is recently new. Time to start looking at new phones now and that means a phablet.