HQRP Battery compatible with ADT Safewatch LYNXCHKITSC LYNXCHKIT-SC Replacement plus HQRP Coaster HQRP&reg; Rechargeable Battery plus HQRP&reg; Coaster; Battery Voltage: 7.2V; Capacity: 2200 mAh; Ni-Mh; Compatible with Original Battery; 200 Days warranty!