The battery for the Apple iPod Nano 3rd generation with 4 GB is a reliable power source specifically designed for the needs of this device model. With a device-specific size and a lithium-polymer (LiPo) battery, it offers optimal performance and longevity. The battery weighs 50 grams and is categorized as a device battery, making it an ideal choice for users who want to maintain their music and media experiences. Using a high-quality battery is crucial to ensure the functionality of the iPod Nano and support the device's long lifespan. This battery is a practical solution for anyone looking to restore or enhance the performance of their iPod Nano. It is sold as a single item and is designed for use with Apple devices, making it a valuable addition for any tech enthusiast.