Iphone 13 battery health 87 July 8, 2019 16 32 64 128 Iphone 13 mini battery health 87 Iphone 13 pro battery health 87 Iphone 13 pro max battery health 87 Iphone 13 87 battery health price Iphone 13 99 battery health Iphone 13 battery capacity Iphone 13 battery ampere Iphone 13 battery mah