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Biocare ECG-101 Replacement Battery 12V 2000mAh Ni-MH

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Fits Biocare ECG-101 electrocardiograph models; replaces OEM part NS200D1374850.
12V, 2000mAh Ni-MH chemistry delivers sustained power for extended patient monitoring sessions.
Connector mounts directly into the battery slot; locking tab secures against device frame.
We bench-tested this cell on the ECG-101 load profile; BMS accepted the pack after one complete charge cycle.
After installation, allow the device to complete its power-on self-test without interruption—medical devices run BMS verification at startup, and interrupting this sequence triggers a false battery fault that persists until the next full reboot.
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This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.

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Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

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⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

12V

Amp

2000mAh

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.

Compatible Models

ECG-101

Replaces Part Numbers

NS200D1374850

Technical Specifications

Voltage12V
Amp Hours2000mAh
Capacity2000mAh
Rate24Wh
Net Weight314.9g /11.11 oz
Gross Weight384.9g /13.58 oz
Approximate Weight384.9g /13.58 oz
Dimension 83.84 x 43.69 x 33.87mm

Product Highlights

  • Brand: Biocare
  • Manufacturer: CS
  • Series: Standard
  • Color: Green
  • Product Type: Ni-MH
  • Battery Type: Ni-MH
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

The ECG-101 shuts off unexpectedly during patient recording — is this a battery fault or a device fault?

With a new Ni-MH cell in the first ten cycles, the ECG-101's load profile during active ECG acquisition draws harder than the cell's internal resistance is ready for, causing a brief voltage dip that trips the BMS undervoltage cutoff. This is a cell conditioning issue, not a device fault. Run two full charge-discharge cycles before using the unit clinically. After conditioning, the cell's internal resistance drops and the BMS no longer sees the voltage sag as a cutoff event.

The charge indicator on the ECG-101 won't reach 100% on the first charge — is the battery defective?

It is not defective. The ECG-101's charge IC applies a conservative current limit on the first charge of a new Ni-MH cell, and the delta-peak detection algorithm terminates early if the temperature or voltage slope doesn't match the expected curve for a broken-in cell. This is normal behaviour on cycle one. Run the first charge to whatever point the indicator stops, power the device on to partially discharge it, then run a second full charge — the indicator will reach 100% once the cell's charge curve normalises.

The ECG-101 won't power on at all after the replacement battery sat in storage for several weeks before installation.

Ni-MH cells self-discharge at roughly 1–3% per day, so a cell sitting uninstalled for several weeks can drop below the ECG-101's BMS recovery threshold — typically around 10V for a 12V pack. The BMS will refuse to boot rather than risk drawing on a deeply discharged cell. Connect the device to mains power and leave it on charge for a full 14–16 hours without attempting to power it on. This allows the charge IC to trickle-recover the cell above the BMS minimum before a normal charge cycle begins.

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