Replacement batteries for Apple's iPod Classic, iPhone, Touch, Mini, Nano, 1st Gen, 2nd Gen, 3rd Gen, 4th Gen, and Video | iToolBatteryKit
iPod 4th Gen Battery Replacement/Repair - YouTube
myCharge for iPod Touch 4th Gen Portable Game Power 1500mAh Battery in Case 847843001227 | eBay
Amazon.com: i-Blason Battery Case Designed for iPod Touch 7/6/5, 2200mAh Portable Charging Rechargeable Extended Battery Slider Case for iPod Touch 5th/6th/7th Generation, Black : Electronics