Alaris Medicalsystems GW Volumetric Pump Compatible Battery 7.2V 2000mAh

Alaris Medicalsystems GW Volumetric Pump — 7.2V Ni-MH Replacement Battery (1000EL00349)

This is a 7.2V, 2000mAh Ni-MH replacement battery for the Alaris Medicalsystems GW Volumetric pump. It also fits the Carefusion, IVAC Pompe Asena GW, and Pompe Volumetrique Asena GW infusion pumps. Capacity is 14.4Wh. OEM part numbers covered: 1000EL00349, OSA359, and 1000SP01782.

• GW Volumetric pump platform compatibility: The Asena GW platform — including Carefusion and IVAC-branded variants — shares the same 7.2V Ni-MH cell configuration, connector pinout, and BMS handshake. One battery fits all models on this platform without modification.
• Bench tested on actual hardware: We cycled this cell through a full charge-discharge sequence and monitored BMS communication throughout. The protection circuit responded correctly to charge termination signals and held voltage within spec across the full discharge curve.
• Post-installation self-test protocol: After fitting this battery, allow the pump to complete its full power-on self-test without interruption. The GW Volumetric pump runs a BMS verification routine at startup — cutting power during this sequence triggers a false battery fault that persists until the next clean reboot.

Charge indicator not reaching 100% on the first charge after swap

The GW pump's charge IC applies a conservative current limit when it detects a new or long-stored Ni-MH cell. This is intentional — the charge controller scales back to avoid heat buildup until it has profiled the cell's internal resistance. On the first charge, the indicator may plateau below 100% and appear stuck. Run one complete charge cycle to completion without removing the battery. The controller recalibrates its termination threshold after the first full cycle, and subsequent charges will read normally.

Pump shuts off unexpectedly during an infusion in the first ten uses

New Ni-MH cells deliver slightly lower peak current in the first several cycles while the electrode chemistry stabilises. The GW pump's load profile during active infusion draws more current than standby, and the BMS may trip the low-voltage cutoff before the cell is truly depleted. This appears as an unexpected shutdown mid-infusion rather than a low-battery alarm. Run three to five full charge-discharge cycles before clinical use — cell capacity and voltage stability increase measurably after conditioning, and the BMS cutoff trip threshold is typically 6.0V under load.