Alternatively, if you're running a device with stock Android, you can enable battery saver mode by pulling down the Android notification shade and tapping on the battery icon. (bgr.com)
Battery icon has been improved; the percentage will be shown in battery saver mode when the «show percentage» option is set. (neowin.net)
Users also have the option to enable a new battery saver mode to save power and extend battery life by reducing performance and most background data operations. (techone3.in)