[header] How to check detailed battery usage in ios 9 [title] Open the battery app. [step] The battery app is located within the settings app. Tap the settings app then scroll down to the battery app, which is located beneath " touch id & passcode. 
" [title] View " low power mode " and " battery percentage " settings. [step] Tap the power toggle to the right of each entry to turn either of these features on or off.