Insten REPLACEMENT BATTERY + TOOLS Compatible With iPod 4th GENERATION 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 Note: A technician is recommended for installation. Our company is not responsible for any damage caused by installation of this accessory. Compatible With Apple: iPod 4th Gen. 30GB (Photo) / 40GB (Photo) / 60GB ( Photo) / 20GB (Color Display) / 60GB (Color Display)