Battery Secrets on iOS 9

1.Hidden Battery Widget – iOS 9 lets you add a new battery widget to the bottom of the ‘Today’ view in the Notification Center. Tap ‘edit’ at the bottom of the Today column to reveal the option to add it. You will notice it also shows a connected Apple Watch. Edit: this widget only works when a Bluetooth device is connected

2.Detailed Battery Usage - ever wondered which apps are killing your battery? Now you can get a detailed breakdown in iOS 9 by going to Settings > Battery then ‘Battery Usage’. These can also be broken down by the time using the Clock button.

3. Manually Enable Low Power Mode – Sometimes you may want to conserve power long before your iPhone or iPad is about to die. Turn the new Low Power Mode on manually by going to Settings > General > Battery > Low Power Mode and toggle it to On.

Source : forpes