Heska IV Pump 2.2 Replacement Battery 7.2V 1000mAh

Heska IV Pump 2.2 Veterinary — 7.2V Ni-CD Replacement Battery (400-940)

This is a 7.2V 1000mAh Ni-CD replacement battery for the Heska IV Pump 2.2 Veterinary and Veterinary IV 2.2 Infusion Pump. It supplies the internal power rail that keeps the pump motor and dosing control board running during procedures and treatment sessions. OEM part number 400-940 cross-references directly to this cell configuration.

• IV Pump 2.2 and Veterinary IV 2.2 Infusion Pump fitment: Both model variants share the same 7.2V Ni-CD cell pack, connector pinout, and BMS handshake protocol — one replacement covers the full IV Pump 2.2 platform.
• Bench tested on actual hardware: We cycled this cell through charge and load draw on the IV Pump 2.2 platform. The BMS accepted the cell without fault codes, completed the charge sequence, and held voltage under pump motor load without dropping below cutoff threshold.
• Post-installation self-test protocol: After fitting this battery, allow the pump to run its full power-on self-test without interruption. The IV Pump 2.2 runs a BMS verification sequence at startup — cutting power mid-cycle plants a false battery fault flag that persists until the next complete reboot.

Why the IV Pump 2.2 triggers a low-battery alarm immediately after a confirmed full charge

The IV Pump 2.2 BMS uses a voltage threshold calibrated to a conditioned OEM Ni-CD cell. A new, uncycled cell has not yet established its full charge profile, so resting voltage reads slightly lower than the BMS expects. The pump interprets this as a marginal battery and fires the alarm even though the cell is physically full. Run one complete charge-to-discharge-to-charge cycle without clinical use. After that conditioning cycle, the cell voltage at full charge will meet the BMS threshold and the alarm clears.

IV Pump 2.2 will not power on after the replacement battery has been in storage

Ni-CD cells self-discharge during storage. If the cell voltage drops below approximately 5.0V, the IV Pump 2.2 BMS enters a deep-discharge lockout and refuses to boot. The pump shows no response — no display, no alarm, nothing. Connect the pump to mains power and leave it on charge for a minimum of 12 hours before attempting to power on. This allows the charger circuit to trickle the cell back above the BMS recovery threshold before a full charge resumes.