It fit perfect. I was using my iPod for 20 years, battery finally died last month, I put this battery in it and it works even better and it lasts over eight hours playing music.  I have the fourth GEN with the monochrome screen. 
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FAST SHIPPER!!!! EXCELLENT PRODUCT!!!!
a***8 (984)- Votos emitidos por el comprador.
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good seller
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Awesome recommended 5☆ Ebay Seller! Fast shipping and exact item!! Thank you 😊
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Great item........just what I needed to test my old Nano. Everything went like clockwork!!!!