12.0V, 2300mAh, Sealed Lead Acid Battery fits Nihon Kohden, Bsm-1100, Bsm-4100, 27.6WhBattery Fits Models: Bsm 1100, Bsm 4100, Bsm 73, Cardiofax 8110 Ekg, Cardiofax Tec7431, Cardiofax Tec7511, Cardiofax Tec7521, Ecg 9130p, Ecg 11a, Ecg 11b, Ecg 6100, Ecg 6151, Ecg 6353, Ecg 6511, Ecg 6551, Ecg 6620p, Ecg 6851k, Ecg 6951, Ecg 6951d, Ecg 7100, Ecg 8020, Ecg 8110p, Ecg 8420, Ecg 9020, Ecg 92c, Ecg 9320, Lcs 2012nk, Qtc6210k Vital Sign Monitor, Tec7100 Defibrillator, Tec7200 Defibrillator, Tec 8200, Tec 8250, Tec 8250k, Tec 8251, Tec