Use emergency power saving mode when your device is low on battery and you still need to be able use some functions on your device.
1.
From the Settings app, tap Battery.
2.
Tap Battery Saver.
3.
Tap TURN ON NOW.
4.
You've completed the steps!
From the Settings app, tap Battery.
Tap Battery Saver.
Tap TURN ON NOW.
You've completed the steps!