Fukuda FC-560 ECG Replacement Battery 12V 3000mAh Ni-MH

Fukuda FC-560 — 12V 3000mAh Ni-MH Replacement Battery

This is a 12V 3000mAh Ni-MH battery for the Fukuda FC-560 portable electrocardiograph. It fits directly into the FC-560 battery compartment and restores the machine to full operating capacity. Capacity figure is sourced from the product specification — 36Wh total energy.

• FC-560 platform fit: The FC-560 uses a 12V Ni-MH cell block sized to its internal bay — 212.40 x 45.70 x 23.60mm. This battery matches that envelope. The BMS on the FC-560 expects Ni-MH charge curves, and this cell responds correctly to that charge profile without triggering chemistry mismatch faults.
• Bench tested on actual hardware: We cycled this cell through the FC-560 charge-discharge sequence and monitored BMS handshake at startup. The self-test passed cleanly after one full conditioning cycle. Voltage held above the device's low-battery cutoff threshold throughout discharge.
• Post-installation self-test protocol: After fitting this battery, let the FC-560 complete its full power-on self-test without interrupting it. The device runs a BMS verification routine at startup — cutting power mid-sequence trips a false battery fault that persists until the next clean reboot. Do not disconnect or press reset during the first boot.

Why the FC-560 flags a battery fault on the first boot after swap

The FC-560 runs a startup verification routine that checks cell voltage and internal resistance against stored thresholds calibrated to a conditioned OEM cell. A fresh replacement cell that has not completed its first full charge-discharge cycle may sit just outside those thresholds. The device interprets this as a fault and logs it. Running one complete charge-discharge cycle before clinical use brings the cell into the expected range and clears the flag on the next boot.

Charge indicator stalling below 100% on the first charge

On the first charge, the FC-560 charge IC applies a conservative current limit to an unrecognised cell — this is normal behaviour, not a fault. The indicator stalls because the IC is waiting for the cell's internal resistance to drop as it warms into its first cycle. Let the charge run to completion without interrupting it. After one full cycle the resistance drops, the IC recognises the cell profile, and subsequent charges reach 100% at the expected rate.