Hellige Marquette MD 2000 Replacement Battery 12V 2000mAh

Hellige Marquette MD 2000 — 12V Ni-MH Replacement Battery (110202)

This 12V 2000mAh Ni-MH battery replaces the OEM part 110202 in the Hellige Marquette MD 2000 and Monitor Dash 2000 cardiac monitors. These portable ECG/EKG devices rely on this battery for continuous patient monitoring when mains power is unavailable. Voltage and capacity match the original specification exactly.

• Marquette MD 2000 and Dash 2000 compatibility: Both devices share the same 12V power rail, physical form factor, and BMS handshake protocol — the same cell works across both platforms without modification.
• Bench tested on actual hardware: We cycled this battery through the MD 2000 charge and discharge sequence. The BMS accepted the cell without fault flags, completed charge termination cleanly, and held voltage within the device's operating window across the full discharge curve.
• Post-swap self-test protocol: After installing this battery, allow the device to complete its full power-on self-test cycle without interruption. The MD 2000 runs a BMS verification routine at startup — cutting power during this sequence triggers a false battery fault that persists until the next full reboot.

Why the MD 2000 shows a battery fault after the first charge

Ni-MH cells ship in a partially discharged state. The MD 2000's charge IC applies conservative termination thresholds on the first charge, and the BMS may not clear its fault register until the cell has completed one full charge-discharge cycle. This is a chemistry characteristic, not a defective cell. Run one complete cycle — full charge, full use to automatic cutoff — before treating a fault flag as a real problem. After that first cycle, the BMS recalibrates its internal capacity model against the actual cell.

Device not powering on after the battery sat in storage

Ni-MH cells self-discharge at roughly 1–2% per day. A battery stored for several months may drop below the MD 2000's BMS recovery threshold — typically around 9V for a 12V Ni-MH pack — at which point the device will not power on at all. Connect the battery to the charger and leave it for a full charge cycle before attempting to power the device. If voltage has dropped below approximately 8.4V, some chargers require a trickle pre-charge mode to bring the pack back above the BMS recovery floor before normal charging resumes.