About this replacement
Fukuda FC-1760 — 12V Ni-MH Replacement Battery (10KR-2300FO)
This is a 12V 3000mAh Ni-MH replacement battery for the Fukuda FC-1760 electrocardiograph. It fits the FC-1760 portable ECG machine used in clinical settings where AC power is unavailable during patient monitoring. Capacity is 36Wh at 12V nominal, matching the original 10KR-2300FO specification.
- FC-1760 platform fit: The FC-1760 uses a 12V Ni-MH pack with a BMS that handshakes on the OEM voltage curve. This replacement matches that curve — the connector orientation, cell count, and discharge profile the device expects. Alternate OEM references MD-BY03, 10N-1700SCR, and 10N-3000SCR all map to this same pack geometry and voltage rail.
- Bench tested on actual hardware: We cycled this pack through charge and discharge while monitoring BMS communication on the FC-1760 interface. The battery passed the device's internal self-test on cycle two and held stable voltage through the full discharge curve without a mid-session cutoff.
- Self-test cycle on first install: After installing the battery, let the FC-1760 complete its full power-on self-test without interrupting the sequence. The device runs a BMS verification at startup — cutting power mid-sequence stores a false battery fault in the device log that persists until the next full reboot.
Why the FC-1760 logs a battery fault on a freshly installed new pack
The FC-1760's charge IC applies a conservative acceptance threshold on its first charge cycle with a new cell. New Ni-MH cells have not yet established a stable internal resistance baseline, so the BMS reads the cell as outside its expected profile. This is not a defective battery — it is a learn-cycle behaviour. Run one full charge-to-discharge cycle before trusting the battery indicator reading or using the device clinically.
FC-1760 shuts off unexpectedly during patient recording
The FC-1760 draws a variable load during active ECG recording — signal amplification, display backlight, and data logging all run simultaneously, which stresses a new cell harder than standby mode does. In the first ten cycles, a new Ni-MH pack has not yet reached full electrochemical capacity, and the BMS can trip on momentary voltage sag under this combined load. The fix is to complete five to ten full charge-discharge cycles before relying on the battery in active recording sessions. After conditioning, charge the pack to 12V nominal and verify the device's battery indicator shows full before starting a patient session.