Original Battery For Ipod Nano 1 2 3 4 5 6 7 4th 5th 6th 7th 1st 2nd Generation 2 Gen 2gen 3rd 3 Gen 3gen + Free Tools - Mobile Phone Batteries - AliExpress
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
iPod nano (2nd Gen) Battery
How to install a iPod Nano 2nd Generation Battery - YouTube
Apple iPod nano 2nd Generation Silver (2 GB) New Battery Fully Functional | eBay
Amazon.com: Replacement Battery for iPod Nano 2 2nd gen Generation 2GB 4GB 8GB Model A1199, with Easy Tools : Electronics
Battery for Apple iPod A1199 Nano 2nd Generation Gen 616-0311 2gb 8gb MA725LL/A | eBay