COMEN AX-600 Patient Monitor Compatible Battery 11.1V 5200mAh

COMEN AX-600 — 11.1V Li-ion Replacement Battery (022-000062-00)

This 11.1V, 5200mAh Li-ion battery replaces part number 022-000062-00 in the COMEN AX-600 portable patient monitor. It powers continuous ECG, SpO₂, NIBP, and temperature monitoring during transport or when mains power is unavailable. Capacity matches the OEM specification at 57.72Wh.

• AX-600 platform fit: The AX-600 uses an 11.1V three-cell Li-ion pack with a BMS that handshakes against cell chemistry and voltage at boot. This replacement uses the same cell configuration and connector pinout, so the device firmware recognises it without throwing a battery fault on startup.
• Bench tested on actual hardware: We ran charge and discharge cycles through the AX-600's onboard charge IC and confirmed the BMS completed its verification sequence without error. Voltage held within the expected window across the full monitoring load profile — ECG, SpO₂, and NIBP cycling simultaneously.
• Post-swap self-test protocol: After installing this battery, let the AX-600 complete its full power-on self-test without interruption. The device runs a BMS verification pass at startup — cutting power during this sequence can set a persistent battery fault flag that stays active until the next clean reboot.

Why the AX-600 alarms low battery immediately after a confirmed full charge

The AX-600's BMS stores a learned capacity model from the previous cell. When a new cell is installed, the BMS compares real-time voltage curves against that stored model during the first discharge. If the new cell's initial voltage response doesn't match the OEM curve exactly, the monitor can trigger a low-battery alarm before the cell is actually depleted. This resolves after one complete charge-discharge cycle, which allows the BMS to rewrite its capacity estimate. Run that conditioning cycle before placing the unit in clinical rotation.

AX-600 not completing boot sequence after battery swap

If the AX-600 stalls partway through startup after a battery replacement, the most likely cause is the cell voltage sitting below the BMS's minimum boot threshold — typically around 10.0V for an 11.1V three-cell pack. This happens when a replacement cell has self-discharged in storage. Connect the unit to mains power first and allow a minimum 30-minute pre-charge before attempting a standalone boot. Once the cell reaches approximately 10.5V, the BMS will clear the fault and the device will complete its startup sequence normally.