MGU&reg; Replacement Battery for Apple iPhone 4s all versions Compatible with A1431 A1387 Original Quality 1430mAh APN: 616-0580 616-0579 616-0582 with Tool Kit Premium quality - 1 Year Manufacturer Warranty Compatible with: ALL iPhone 4s Models - APN: 616-0579, 616-0580, 616-0581 for Apple iPhone 4s A1387 (AT&T, Verizon, Sprint), A1431 (International Versions) *** Important: This battery will only work for iPhone 4s not iPhone 4 *** Capacity: 1430mAh. Battery type: Lithium Ion, Voltage: 3.7V Li-ion. Duration: 5.3Wh Youtube "How to video" included (Basic Technical Skills Required to replace battery) iPhone 4s Replacement Battery with Tool Kit