About this replacement
Burdick Medic 4 Defibrillator — 24V Ni-MH Replacement Battery (E-0143)
This is a 24V 2500mAh Ni-MH replacement battery for the Burdick Medic 4 portable defibrillator. It replaces OEM part number E-0143 and fits the Medic 4 directly. Capacity is rated at 60Wh.
- Medic 4 platform fit: The Medic 4 uses a 24V Ni-MH pack with a specific connector and BMS handshake that authenticates cell chemistry on boot. This replacement matches that voltage rail and pack geometry so the device completes its startup sequence without throwing a battery fault.
- Bench tested on actual hardware: We cycled this pack through the Medic 4's charge and discharge profile. The BMS accepted the cell chemistry on the first charge cycle and passed the device's internal self-test without intervention.
- Post-swap startup protocol: After fitting this battery, let the Medic 4 complete its full power-on self-test without interruption. The device runs a BMS verification sequence at startup — cutting power during this window logs a battery fault that persists until the next clean reboot.
Medic 4 not completing boot sequence on a new battery
The Medic 4's BMS runs a cell verification step during startup. On a new Ni-MH pack that hasn't completed its first full charge-discharge cycle, the BMS can flag a chemistry mismatch and halt the boot sequence. This is a calibration state, not a hardware fault. Run one full charge cycle before attempting clinical deployment — the BMS learn cycle completes during that first discharge and the boot sequence clears on the next startup.
Medic 4 alarming low battery immediately after a confirmed full charge
The Medic 4 measures battery state against a voltage threshold calibrated to an aged OEM cell's discharge curve. A fresh Ni-MH pack delivers a slightly different voltage profile in its first few cycles, which can trigger the low-battery alarm even when the pack is fully charged. This is not a defective cell — it is the BMS reading a new cell's curve as out of range. Complete one full charge-discharge cycle and the alarm clears. If the alarm persists after three cycles, check resting voltage at the pack terminals — it should read at or above 24V.