Samsung Galaxy A20e
Android 9.0
Select help topic
1 Find "Battery"
Slide two fingers downwards starting from the top of the screen.
Press the settings icon.
Press Device care.
Press Battery.
2 Extend the battery life
Press Power mode.
Press the required setting.
Press Apply to turn on the function.
3 Return to the home screen
Press the Home key to return to the home screen.