Iphone 13 battery health 84 July 8, 2019 16 32 64 128 Iphone 13 pro battery health 84 Iphone 13 pro max battery health 84 Iphone 13 84 battery health price Iphone 13 mini 84 battery health Iphone 13 battery capacity Iphone 13 99 battery health Iphone 13 battery ampere