NewPower99 Battery Replacement Kit for iPhone 4S with Installation Video, Tools, and Extended Life Battery. Warranty and Instructional Video Available Only With Kit Purchased from Innovate88 High Capacity 1450 mAh 3.7V Battery Replaces iPhone 4S Battery Kit Includes Video Instructions and Special Installation Tools MC918LL/A, MC919LL/A, MC920LL/A, MC921LL/A, MD269LL/A, MD276LL/A, MD277LL/A, MD278LL/A, MD279LL/A, MD280LL/A, MD281LL/A, MD377LL/A, MD378LL/A, MD379LL/A, MD380LL/A, MD381LL/A, MD382LL/A, 616-0579, GB-S10-423282-0100, 616-0479, 616-0580, LIS1474APPC