Replacement Battery For Ipod Nano 4th-7th Gen Models 616-0406/0407/0531/0640. Upgrade Your IPod Nano with Our Reliable Replacement Battery, Designed to Ensure Optimum Performance for Your Device. This Lithium-ion Battery Fits Various IPod Nano Models, Providing Consistent Power to Keep Your Music Playing. Key Features: - Compatible Models: IPod Nano 4 (616-0406), Nano 5 (616-0407), Nano 6 (616-0531), Nano 7 (616-0640) - Battery Capacity: 0-1300mAh for Lasting Performance - Conditioning: Requires 2-3 Full Charge and Discharge Cycles for Full Effectiveness - Packaging: Delivered in a Secure Bubble Envelope Bag Note: For Best Performance, Fully Charge and Discharge the Battery a Few Times to Maximize Longevity.. Your order tracking code will be sent on shipping and takes up to 5 days to show live information.