HQRP Battery compatible with Tri-tronics Field 70 (1999-2001), Flyway Special XL, Flyway Special XLS Remote Controlled Dog Training Collar Receiver plus Coaster HQRP&reg; Rechargeable Battery plus HQRP&reg; Coaster; Battery Voltage: 3.6V; Capacity: 800 mAh; Ni-Mh; Compatible with Original Battery; 200 Days warranty!