This is a generic, equivalent one, 100% compatible. This 3.7V 850mAh Replacement Li-ion battery is designed to compatible with Apple iPod 20GB M9244LL/A 30GB M8948LL/A.

Specifications:
* Product Type: generic/equivalent
* Battery Voltage: 3.7V
* Battery Capacity: 850mAh
* Chemistry: Li-ion
* Dimensions: 50.8 x 31.75 x 4.57mm (LxWxH)
* Condition: new, 1 Year Warranty!
* no memory effect so that you can charge battery at anytime.
* Integrated microchip prevents overcharging & lengthens battery life.

Compatible Part Numbers:
20GB: M9244LL/A
30GB: M8948LL/A

Compatible with the following devices:
For Apple iPod 3rd Generation
For Apple iPod 3 Gen

Package Included:
1 x 3.7V 850mAh Replacement Battery for Apple iPod 20GB M9244LL/A 30GB M8948LL/A