Why does Anker 737 PowerBank stop charging when an iPhone is charged to 80%?
If your iPhone stops charging when being charged to 80%, it may due to the turning on of "Optimized Battery Charging". Please turn it off to see whether it helps: go to the "Settings" - open "Battery" - open "Battery Health" - Turn off "Optimized Battery Charging" .
If the problem is not solved after the operation, please contact us for assistance.
