For Nano1 Battery For Ipod Nano 1 1st Gen Mp3 1gb 2gb 4gb Batterie Bateria Batteriej - Mobile Phone Batteries - AliExpress
iPod nano (第3世代) バッテリー 370mAh 616-0337
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
Original new Replacement Battery For ipod Nano6 6G 6th Generation MP3 Li-Polymer Rechargeable Nano 6 616-0531 Batteries + Tools - AliExpress