Replacement Battery Pack with Circuit Board for Medfusion 4000 Syringe Pump — Part 22-4050-51 / B11798

Replacement battery pack designed for the Medfusion 4000 syringe pump. This unit is compatible with part numbers 22-4050-51 and B11798 and ships with the included circuit board. Use it as a direct replacement to restore battery operation and maintain pump functionality during service or routine maintenance.