Insten 3.7V 1200mAh Battery Replacement Kit for iPod 4G/Photo with 2-Piece Plastic Tool Keeps the music playing on your Apple iPod with this replacement battery. Comes with the necessary tool to open up your iPod. This is a high capacity/rechargeable Li-Ion (Lithium Ion) battery with premium cell. Voltage: 3.7 V. Keeps the music playing on your Apple iPod with this replacement battery. This is a high capacity/rechargeable Li-Ion (Lithium Ion) battery with premium cell. Voltage: 3.7 V Compatible with: iPod with color display: 20/30/60 GB, iPod Photo: 40/60 GB