Insten 1300mAh Battery Pack + Open tools Kit Compatible With iPod PHOTO 4G 4TH Generation 4 Gen 20GB 30GB 40G 60GB Compatible With Apple: iPod 4th Gen. 20GB (Color Display)/30GB (Color Display)/40GB (Photo)/60GB (Color Display)/60GB (Photo). Apple iPod, iPhone, or iPad are registered trademarks of Apple, Inc. Products are Apple compatible. 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. Dimension: 1.94 x 1.37 x 0.13" [49.28 x 34.80 x 3.30 mm]. Accessory Only. iPod not included. Note: A technician is recommended for installation. Our company is not responsible for any damage caused by installation of this accessory.