HQRP 800mAh Battery compatible with Audiovox XMp3i / XPMP3H1 XM Satellite Radio / MP3 Replacement plus HQRP Universal Screen Protector HQRP&reg; Replacement Battery plus HQRP&reg; Universal Screen Protector; Battery Type: Li-Polymer rechargeable battery; Voltage: 3.7v; Capacity: 800mAh; 100% compatible with Original Battery and Charger devices. 200 days warranty!