Battery size iphone 15 pro vs pro max July 8, 2019 16 32 64 128 Iphone 15 pro max vs 14 pro max battery size Iphone 15 pro max vs 16 pro max battery size Iphone 15 pro max battery Iphone 11 vs pro vs pro max battery life Battery test iphone 11 pro max vs 13 Iphone 13 pro max ios 16 vs 15 battery Iphone x ios 15 vs ios 16 battery test