10HR-AAU Kenz Cardico ECG-601 Replacement Battery 12V 2000mAh

Kenz Cardico ECG-601 — 12V Ni-MH Replacement Battery (10HR-AAU)

This 12V, 2000mAh Ni-MH battery replaces part number 10HR-AAU in the Kenz Cardico ECG-601 electrocardiograph. It fits both the ECG-601 and Cardico 601 variants — same housing, same connector, same voltage rail. Capacity matches the original specification at 24Wh.

• ECG-601 and Cardico 601 compatibility: Both model designations share the same internal power architecture, BMS handshake protocol, and physical connector. One battery covers either unit without modification.
• Bench tested on actual hardware: We cycled this battery through charge and discharge on the ECG-601 platform and confirmed the BMS accepted the cell, completed its verification handshake, and reported state-of-charge correctly after the first full cycle.
• Post-installation self-test protocol: After fitting the battery, let the ECG-601 complete its full power-on self-test without interruption. The device runs a BMS verification sequence at startup — cutting power during this phase triggers a false battery fault that persists until the next clean reboot.

Device not completing boot sequence on new battery

The ECG-601 runs a startup self-test that checks cell voltage against a minimum threshold before releasing the boot sequence. A new Ni-MH cell arriving partially discharged from storage can sit just below that threshold, causing the device to stall or loop at the boot screen. This is a BMS gate, not a hardware fault. Charge the battery fully before the first installation — the BMS needs to see the cell at or above 13.2V to clear the boot check.

Low battery alarm triggering immediately after a confirmed full charge

The ECG-601 BMS compares internal resistance and discharge curve against stored OEM cell parameters. A new cell behaves differently from a conditioned one — higher internal resistance in the first few cycles causes the BMS to read available capacity conservatively and trip the low-battery alarm early. This is not a faulty battery. Run one complete charge-discharge cycle and the BMS recalibrates its capacity estimate. The alarm clears once the cell's resistance profile matches expected values, typically within two full cycles.