HQRP Transmitter Battery for GP 30AAAM6WML, Dt-Systems Super Trainer EDT 200, EDT 202, EDT 300, EDT 302 Dog Training Collar Transmitter + Coaster HQRP&reg; Rechargeable Transmitter Battery plus HQRP&reg; Coaster; Battery Voltage: 7.2V; Capacity: 350 mAh; Ni-Mh; 100% compatible with Original Battery; 200 Days warranty!