OnePlus Nord
Android 11.0
Select help topic
1 Find "Battery Saver"
Slide two fingers downwards starting from the top of the screen.
Press the settings icon.
Press Battery.
Press Battery Saver.
2 Extend the battery life
Press the required setting.
Press the indicator next to "Turn on now" to turn on the function.
3 Return to the home screen
Slide your finger upwards starting from the bottom of the screen to return to the home screen.