Iphone 12 battery life vs 15 July 8, 2019 16 32 64 128 Iphone 12 battery life vs 15 pro Iphone 12 pro max battery life vs 15 pro max Iphone 12 mini battery life vs iphone 15 pro Iphone 12 mini battery life vs iphone 15 Iphone 12 vs 15 battery life reddit Iphone 15 vs oneplus 12 battery life Iphone 12 battery life Iphone 12 pro battery life