About this replacement
Biocare ECG-101 — 12V Ni-MH Replacement Battery (NS200D1374850)
This is a 12V, 2000mAh Ni-MH replacement battery for the Biocare ECG-101 portable electrocardiograph. It fits the ECG-101 directly using OEM part number NS200D1374850. The ECG-101 is a portable cardiac monitoring device used in clinical and point-of-care settings to record and analyze heart electrical activity.
- ECG-101 platform fit: The NS200D1374850 cell block matches the ECG-101's 12V power rail, connector pinout, and BMS handshake protocol. No modification is needed to the battery bay or charging circuit.
- Bench tested on actual hardware: We cycled this cell through the ECG-101's charge and discharge profile. The BMS accepted the new cell on first insertion and completed its verification routine without triggering a fault flag.
- Post-swap startup protocol: After installing this battery, allow the ECG-101 to complete its full power-on self-test without powering the device off mid-sequence. Interrupting the startup BMS verification cycle can log a persistent battery fault that only clears on the next clean reboot.
ECG-101 not completing boot sequence after battery swap
The ECG-101 runs a BMS learn cycle during its first few boot sequences with a new cell. If the device stalls mid-boot or loops back to the startup screen, the BMS has not yet validated the new cell's charge state. Charge the battery fully before the first power-on — the onboard charge IC targets 14.4V at termination for a 12V Ni-MH pack. Once a full charge completes, boot the device and let the self-test run to completion without interruption.
Low battery alarm triggers immediately after a confirmed full charge
This happens because the ECG-101's BMS compares cell voltage against thresholds calibrated to the original factory cell's charge curve. A new Ni-MH cell has a slightly different voltage profile in its first five to ten cycles, which the BMS can read as below threshold even when the cell is fully charged. Run one complete charge-discharge cycle outside of clinical use to let the BMS recalibrate its low-voltage reference point. After that first conditioning cycle, the alarm threshold aligns correctly with the new cell's actual state of charge.