iPhone External Battery Charger Backup

3.7V 2300mAh / 3000mAh Apple iPhone External Battery Charger Backup , High Capacity Specifications: Battery Capacity: 2300mAh/3000mAh (3.7V) DC IN: 5V/1000mA DC OUT: 5V/500mA Size: L70.0*W40.5*H23.0mm Weight: 71.5g/75g Docking Backup Battery (2300mAh/3000mAh) * More stylish, easy to carry. * Large capacity Li-ion rechargeable battery. * 3 Highlight LED power indicator design. * Metallic SF surface coating technology, no fingerprint. * 1.0A charging high-speed input, reduce