Abbott Laboratories 4000 Plus Infusion Pump 12V Replacement Battery

Abbott Laboratories 4000 Plus Infusion Pump — 12V Sealed Lead Acid Replacement Battery

This 12V, 2300mAh sealed lead-acid battery is a direct replacement for the Abbott Laboratories 4000 Plus Infusion Pump (642-76006-001) and the Omni Flo 4000. It maintains the internal power supply at the voltage and capacity required by the pump's delivery control electronics. No OEM part number exists for this cell — match using the model numbers above.

• 4000 Plus and Omni Flo 4000 compatibility: Both platforms run the same 12V internal power architecture and share an identical battery bay footprint at 178 x 66.6 x 35mm. The BMS on each model monitors float voltage from the same charge IC, so one cell revision covers both units.
• Bench tested on actual hardware: We cycled this cell through charge and load sequences on the 4000 Plus platform. The BMS accepted the cell without fault codes, and the charge IC brought the cell to float at 13.8V as expected under standard sealed lead-acid charge profile.
• Post-installation self-test protocol: After fitting this battery, allow the pump to complete its full power-on self-test without interruption. The 4000 Plus runs a BMS verification cycle at startup — cutting power mid-sequence registers a false battery fault that persists until the next clean reboot.

Why the 4000 Plus triggers a low-battery alarm after the replacement cell is fully charged

The 4000 Plus charge IC applies conservative voltage thresholds tuned to an aged OEM cell's charge curve. A new sealed lead-acid cell charges to a slightly higher open-circuit voltage than a degraded original, which can confuse the state-of-charge register on the first cycle. The BMS may read the cell as underperforming until one full charge-discharge cycle recalibrates the register. Run the pump on battery until the low-battery alarm sounds, then charge to float — the alarm should clear permanently after that cycle.

Pump will not power on after the replacement battery was stored before installation

Sealed lead-acid cells self-discharge at roughly 3–4% per month. If the battery sat in storage for several months before fitting, its open-circuit voltage may have dropped below the BMS recovery threshold — typically around 10.5V for a 12V cell. The pump's controller will refuse to start rather than draw from a cell it cannot verify as safe. Connect the battery to a compatible 12V SLA charger externally for at least four hours before installing it in the pump, confirming the cell reads above 12.0V at rest before fitting.