The iPhone internal battery also gets charged when putting the case on charge. So the example you put in the charger, at night & your iPhone battery next morning have 100% battery & your Battery Always Case an extra 80% backup when needed!
All our products are FCC, CE and RoHS approved. iPhone 6/6S Battery Case has a battery capacity of 1500 mAh . The iPhone 6 Plus/6S Plus has a battery capacity of 2000 mAh.