Masione 3.7V 1420mAh Li-ion Internal Replacement Battery for Apple iPhone 4 Compatible with all iPhone 4 phones. A1332 (GSM), A1349 (CDMA), Verizon, AT & T, T-Mobile, Sprint, and factory unlocked alike This battery has the exact same capacity as the OEM original one Top quality, made from only PREMIUM materials battery This is an internal part and some minimal technical skills are required to replace it 30 days money back and 1 year warranty