Phone charges at night and is 100% when I leave for work at 7:30. It is 12:00 noon and I'm already down to 31%. Before, with iOS 7, I'd be around 75% by this time of day (60% minimum depending on usage). Siri disabled Animations disabled ("reduce motion" setting) Predictive text disabled Screen brightness auto No apps running in background Always on WiFi etc etc In the new "Battery Usage" section in Settings, the top three are: Messages: 61% Home & Lock Screen: 14% App Store: 8% Anyone else with a 4S having battery trouble? I know pretty much the entire internet says not to install iOS 8 on a 4S but that was mostly because of performance lag or certain features not being available. Performance is on par with iOS 7, and I don't care about those features.