2000mAh super battery, Which can upgrade your iPod battery life.Video(5th, 5.5 Enhanced)/Classic(6th, 6.5th, 7thGen) Thin Version.After upgraded, your iPod will last up to 150 hours playing media.This battery only fit iPod video & Classic Thin Slim Version that has an iflash QUAD, an iFlash SOLO, Generic MSATA and M.2.If you have a regular Hard Drive or any other iflash, you will need to get a Thick back.This battery is much bigger than the original one..AKA, it will not work with any configuration of the original iPods that have a normal hard drive.They only work with the iFlash listed above in Thin verion, or any iFlash adapter with a thick back.