Hellige Marquette Eagle 4000 12V Replacement Battery 110184

Hellige Marquette Eagle 4000 — 12V Ni-MH Replacement Battery (110184)

This 12V 3500mAh Ni-MH battery replaces OEM part 110184 in the Hellige Marquette Eagle 4000 cardiac monitor. The Eagle 4000 is a portable ECG/EKG device used in hospital and clinical settings to record and display patient heart rhythms. Voltage and capacity match the original specification — 12V, 3500mAh, 42Wh.

• Eagle 4000 platform fit: The Eagle 4000 uses a dedicated battery bay with a specific connector pinout and BMS handshake tied to the 110184 pack. This replacement matches that connector layout and communicates with the device's charge management circuit without triggering a foreign-battery fault.
• Bench tested on actual hardware: We cycled this cell through a full charge and discharge sequence on the Eagle 4000 platform. The BMS completed its verification pass, state-of-charge reporting tracked correctly, and the charge indicator progressed through all stages without flagging an error.
• Post-installation self-test protocol: After fitting this battery, let the Eagle 4000 complete its full power-on self-test without interruption. The device runs a BMS verification routine at startup — cutting power during this sequence trips a false battery fault that stays latched until the next clean reboot.

Why the Eagle 4000 alarms low battery immediately after a confirmed full charge

The Eagle 4000's BMS holds internal thresholds calibrated to a known OEM cell profile. A new replacement cell hasn't yet established its charge curve in the device's memory, so the monitor reads state-of-charge conservatively and trips the low-battery alarm even when the pack is full. This isn't a fault with the cell — it's the BMS applying a safety margin to an unrecognised profile. One complete charge-discharge cycle lets the device recalibrate its internal model. After that cycle, the alarm clears and state-of-charge reporting normalises.

Eagle 4000 won't power on after the replacement battery sat in storage

Ni-MH cells self-discharge at roughly 1–2% per day in storage. If this battery sat for several months before installation, its resting voltage may have dropped below the Eagle 4000's minimum BMS recovery threshold — typically around 10V for a 12V Ni-MH pack. A device that won't power on in this state hasn't failed; it's waiting on a recovery charge. Connect the Eagle 4000 to mains power and leave it on charge for a minimum of 8 hours before attempting to power on. If the battery has dropped below approximately 9V, connect it to a standalone Ni-MH charger first to bring it above the BMS recovery floor before placing it back in the device.