Alaris Medicalsystems 8000 Replacement Battery 12V 4000mAh

Alaris Medicalsystems 8000 / 8015 / 8220 Series — 12V Ni-MH Replacement Battery (145997-101-8000)

This is a 12V, 4000mAh Ni-MH battery for the Alaris Medicalsystems 8000-series infusion pump. It fits the 8000, 8001, 8015, and 8220 models, along with 15 additional compatible units in the same platform family. Voltage and connector match OEM spec (cross-references: 145997-101, 49000167, BK-45A10U1A, OM11322).

• 8000-series platform compatibility: These models share the same 12V Ni-MH battery bay, connector pinout, and BMS handshake protocol. The infusion pump's charge IC communicates directly with the battery's internal protection circuit, so chemistry and voltage must match exactly — lithium substitutes will trigger a fault and disable the pump.
• Bench tested on actual hardware: We ran this cell through the 8000-series pump's startup self-test and charge cycle. The BMS cleared the power-on verification sequence without faults, and the charge IC accepted the cell without triggering a chemistry mismatch alarm.
• First-use cycle requirement: After installation, let the pump complete its full power-on self-test without interruption. The BMS runs a capacity verification at boot — cutting power mid-sequence stores a false battery fault that flags on every subsequent startup until a complete reboot cycle clears it.

Low battery alarm on the 8000 pump after a confirmed full charge

The 8000 series uses a charge IC calibrated against OEM cell chemistry. A new replacement cell hasn't yet built up the charge history the BMS uses to calculate state-of-charge accurately. On the first one or two cycles, the pump's battery gauge can read low even when the cell is fully charged. Run one complete charge-discharge cycle before clinical deployment. After that cycle, the BMS recalibrates and the alarm clears.

Pump will not power on after battery sat in storage

Ni-MH cells self-discharge at roughly 1–2% per day in storage. A cell that has sat for several months can drop below the 8000-series BMS recovery threshold — typically around 9V for a 12V pack — and the pump refuses to boot. Connect the pump to mains power first and allow the charge IC to trickle-charge the pack back above the 9V recovery floor before attempting a standalone power-on.