iPhone 4 Battery : Stalion Strength Replacement Li-Ion Polymer Battery 1420mAh 3.7V for iPhone 4 (4G)[24-Month Warranty](compatible with GSM & CDMA Models A1349 / A1332) Replacement Battery Model APN: 616-0512, 616-0513, 616-0520, 606-0521 for Apple iPhone 4 A1349 (AT&T), A1332 (Verizon). Battery Specs. Capacity: 1420mAh. Battery type: Lithium Ion, Voltage: 3.7V Li-ion. Duration: 5.25Wh Tool Set Sold Separately."TECHNICAL EXPERIENCE REQUIRED" Battery that is designed specifically for your Apple iPhone 4 (GSM & CDMA Versions). CE and ROHS certified. Replacement for over charged internal batteries or dying battery cells. Prolong your iPhone life with a Stalion replacement battery!