TPE Replacement Battery Mobile Phone Battery & Tools Kit for iPhone 4 4G 1420mAh 3.7V Li-Ion - 12 Months Warranty Overcharger and Discharger Circuit Protection, CE-/FCC-/RoHS-Certified for safety. Original Quality iphone 4 Battery This battery is 100% as the original. We offer 30 days return policy. If for any reason, this battery will not last as the original, then you can return it back for a full refund within 30 days. Battery type: rechargable Li-ion Battery; Capacity: 1420mAh; Voltage: 3.7V.