About this replacement
Designed for Fujikura, Sumitomo devices. Compatible models include FSM-50S, FSM-50R, FSM-60S, FSM-60R, FSM-18S, FSM-18R, Arc Fusion Splicer. Replacement part numbers include TYPE-39, TYPE-37, BTR-08, BTR-08R, BU-66S, BU-66L. Key specifications: 13.2V, 4000mAh, Ni-MH.