iPhone 15 Pro Max

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Using optimised battery charging, your phone reduces the time it spends fully charged which prolongs the overall battery life.

Step 1 of 6

Press Settings.

Step 2 of 6

Press Battery.

Step 3 of 6

Press Battery Health & Charging.

Step 4 of 6

Press Charging Optimisation.

Step 5 of 6

Press Optimised Battery Charging to turn the function on or off.

Step 6 of 6

Slide your finger upwards starting from the bottom of the screen to return to the home screen.