Original Replacement Battery 616-0407 For Ipod Nano 4 4g 4th Generation Mp3 Nano4+ Free Tools - Mobile Phone Batteries - AliExpress
Apple iPod nano 4th Gen Orange (8 GB) New Battery. New 885909259267 | eBay
Used Apple iPod Nano 4th Gen 16GB Purple, MP3 Audio/Video Player, Like New, New Battery - Walmart.com
Replaced the dead battery in an old iPod Nano I bought (really wanted a cheap Product Red one) and not even 2 days later the replacement battery expanded. I would call this
Amazon.com: Replacement Battery for Apple iPod Nano 4th 16GB iPod Nano 4th 4GB iPod Nano 4th 8GB iPod Nano 4th MB903LL/A Part NO 616-0405 616-0407 P11G73-01-S01 : Electronics