Mindray Umec10 LI23S005A Replacement Battery 11.1V 5200mAh

Mindray Umec10 — 11.1V Li-ion Replacement Battery (LI23S005A)

This is an 11.1V, 5200mAh Li-ion replacement battery for the Mindray Umec10 portable vital signs monitor. It replaces OEM part LI23S005A and fits the Umec10 directly. Use it in hospital wards, clinical settings, or transport scenarios where continuous patient monitoring is required.

• Umec10 compatibility: The Umec10 uses an 11.1V three-cell Li-ion pack with a BMS that handshakes on voltage, temperature, and cell-ID registers. This replacement matches that electrical profile — same connector, same cell configuration, same BMS communication protocol the device expects at boot.
• Bench tested on actual hardware: We ran this cell through the Umec10 power-on self-test sequence. The BMS reported cell status correctly, charge acceptance was normal across two full cycles, and the device completed its internal verification without throwing a battery fault.
• Post-swap startup protocol: After fitting this battery, let the Umec10 complete its full power-on self-test without interruption. The device runs a BMS verification pass at startup — cutting power during this sequence causes a false battery fault that persists until the next clean reboot.

Why the Umec10 reports a battery fault after a confirmed full charge

The Umec10's BMS stores a learned capacity profile from the previous cell. When a new battery is installed, the BMS compares measured cell behaviour against that stored baseline. On the first cycle, the new cell's internal resistance and discharge curve differ enough from the OEM baseline to trigger a threshold mismatch. Run one complete charge-discharge cycle on the device before clinical deployment — after that cycle, the BMS recalibrates its internal registers to the new cell's actual curve and the fault clears.

Umec10 failing to power on after battery was stored before installation

Li-ion cells self-discharge during storage. If this battery sat long enough to drop below approximately 9V, the Umec10's BMS will block the power-on sequence entirely — it reads the low cell voltage as a fault condition, not a depleted charge state. Connect the device to mains power first and leave it on charge for at least two hours before attempting to boot. Once the cells recover above the BMS recovery threshold, the device will start normally.