Is your phone battery running out quickly? The Baseus High Volume for Apple iPhone 7, 2250mAh Battery is a spare power supply. It should be used Apple mobile phones, such as iPhone 7. This Lithium-ion (Li-ion) Phone Battery provides a capacity of 2250 mAh, which ensures restored capacity of your old phone. To keep this mobile phone battery running at its full capacity, please read and follow the directions in the instruction manual on correct battery handling.