Bard Medsystems Harvard Syringe Pump 3.6V Replacement Battery

Bard Medsystems Harvard Syringe Pump — 3.6V Ni-CD Replacement Battery (10930)

This 3.6V, 5000mAh Ni-CD battery is a direct replacement for the Bard Medsystems Harvard Syringe Pump. OEM part numbers covered include 10930, 6029, B11229, and HV-9250-003. The Harvard Syringe Pump is a clinical infusion device used in hospital and healthcare settings to deliver precise intravenous medication doses.

• Harvard Syringe Pump platform fit: These OEM part numbers share the same 3.6V Ni-CD cell configuration, connector type, and BMS handshake protocol. Any of the four cross-reference numbers will match this pack without wiring modification.
• Bench tested on actual hardware: We cycled this cell through full charge and load discharge on the Harvard Syringe Pump platform. The BMS accepted the new pack and passed internal resistance verification without flagging a chemistry mismatch.
• Post-installation self-test requirement: After fitting this battery, allow the pump to complete its full power-on self-test without interruption. The device runs a BMS verification routine at startup — cutting power mid-sequence stores a false battery fault that will persist until the next clean reboot.

Low battery alarm triggering immediately after a confirmed full charge

Ni-CD cells from storage have not yet completed a full charge-discharge learn cycle, so the pump's BMS applies a conservative internal resistance threshold that a new cell rarely meets on first charge. The device reads this as a below-minimum state and triggers the alarm even though the cell is fully charged. Run one complete charge-to-cutoff, then a full discharge under device load, and the BMS recalibrates its threshold. After that cycle, the alarm clears and the pump reports charge state accurately.

Harvard Syringe Pump failing to boot after the battery sat in storage

Ni-CD cells self-discharge at roughly 15–20% per month in storage. If a replacement pack has been sitting long enough, the cell voltage drops below the BMS recovery threshold — typically around 3.0V — and the pump will not initiate its boot sequence. Connect the battery to the charger before installing it in the device and allow a full charge cycle to complete. Once the cell climbs above the recovery threshold, the pump will boot and run its self-test normally.