HQRP Battery for SportDOG SportHunter 800 SD-800 ST-120 Remote Dog Training Transmitter Sport Hunter ST120-BCE + Coaster HQRP&reg; Rechargeable Battery plus HQRP&reg; Coaster; Battery Voltage: 7.2V; Capacity: 210 mAh; Ni-Mh; 100% compatible with Original Battery; 200 Days warranty!