iPhone 11 Pro
Turning optimised battery charging on or off
Using optimised battery charging, your phone reduces the time it spends fully charged which prolongs the overall battery life.
Press Settings.
Press Battery.
Press Battery Health & Charging.
Press the indicator next to "Optimised Battery Charging" to turn the function on or off.
Slide your finger upwards starting from the bottom of the screen to return to the home screen.