B2G1 Free Replacement Battery 3.7V for Apple iPod Nano 6 Gen 6G 6th Gen 616-0531 | 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