Cameron sino Li-Polymer Replacement Battery 200mAh for Apple iPod Nano 7th , iPod Nano 7 With Tools Kit 12 Months Warranty Replacement for Part Numbers:616-0639, 616-0640 Compatible with the Following Models: Apple iPod Nano 7th,iPod Nano 7 Capacity: 200mAh 3.7V Li-Polymer Battery With Tools Kit. Cameron Sino Over 10 Years Battery Manufacturing Experience.