HQRP Replacement Battery for Microsoft 1st Generation Zune MP3 Player + HQRP Screen Protector 720 mAh High Capacity, 3.7V, with Longer Runtime Li-Polymer Rechargeable Internal Battery HQRP Replacement MP3 Battery; + HQRP Screen Protector. 100% compatible with original batteries and chargers 200 days warranty; Compatible with: Microsoft 1st Generation Zune, G71C0006Z110 Microsoft Zune 1093;