HQRP Battery Compatible with RTI 40-210154-17, ATB-950, ATB-950-SANUF, ATB-850, ATB-1200 ATB-1200-SANUF Universal System Controller/Remote Control HQRP&reg; Rechargeable Battery; Battery Voltage: 3.7V; Capacity: 850 mAh; Li-Ion; Compatible with Original Battery; 200 Days warranty!