Replacement Li-Polymer Battery for i Pod Touch 4th Gen, DOCA 3.44Wh 3.7V Rechargeable Battery for Model No. 616-0550 | Opening Pry Tool Kits Included (Touch 4th Gen) Replacement Li-polymer Battery Model APN: 616-0553 for iPod Touch 4 Gen., comes with the necessary tool to open up your iPod. High capacity/rechargeable Li-Ion (Lithium Ion) battery with premium cell. Voltage: 3.7 V, Capacity: 3.44Whr. Easy and convenient to install the battery by using opening tool kits. Two plastic opening tool kits and one metal tool are professional to open the case of iPod, but must be gently use them. Built-in Seiko circuit protection board, no fire at short circuit, over discharge, shock, acupuncture, vibration, heat and other state, no explosion and so on. 2 years worry-free return warranty and easy-to-reach support.If you have any problem,just contact with us .