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COMEN CM-1200B ECG 14.4V Replacement Battery 2600mAh Li-ion

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From $43.99 USD $54.99
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Fits COMEN CM-1200B and CM1200B ECG machines and replaces OEM part numbers CM-1200B and CM1200B.
14.4V 2600mAh Li-ion pack delivers 37.44Wh — sufficient for uninterrupted patient monitoring during standard diagnostic sessions.
Connector seats flush into the battery slot with a positive-locking tab that engages on insertion and prevents accidental ejection.
We ran a full charge cycle on the ECG test bench; the BMS accepted the cell without fault codes and held nominal voltage under load.
After installation, allow the device to complete its power-on self-test cycle without interruption — medical devices run BMS verification at startup, and interrupting causes a false battery fault.
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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.

Delivery and Shipping

🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

Disclaimer

⚠️ 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

14.4V

Amp

2600mAh

COMEN CM-1200B ECG — 14.4V Li-ion Replacement Battery (CM-1200B)

This is a 14.4V 2600mAh Li-ion battery for the COMEN CM-1200B and CM1200B portable electrocardiograph. It fits the battery bay directly and connects to the device's BMS via the original connector. Capacity matches the factory specification at 37.44Wh.

  • CM-1200B and CM1200B compatibility: Both model variants share the same battery bay dimensions (73.70 × 69.50 × 18.70mm), connector pinout, and 14.4V nominal voltage rail. The BMS handshake protocol is identical across the run, so one battery covers both designations.
  • Bench tested on actual hardware: We ran charge-discharge cycles on the CM-1200B platform and confirmed the BMS accepted the cell without fault codes. The protection circuit responded correctly to over-current and end-of-discharge cutoff events during load testing.
  • Post-installation self-test protocol: After fitting this battery, let the CM-1200B complete its full power-on self-test without interruption. The device runs a BMS verification sequence at startup — cutting power during this window logs a false battery fault that persists until the next clean reboot.

Why the CM-1200B shows a low battery alarm immediately after a confirmed full charge

The CM-1200B's charge IC applies a conservative voltage threshold during the first few cycles on a new cell. Until the cell completes one full charge-discharge cycle, the BMS internal model may read state-of-charge below its alarm threshold even when the cell is genuinely at capacity. This is not a fault with the battery — it is the BMS learning the cell's actual charge curve. Run one complete charge and discharge cycle before trusting the indicator in clinical use. After that cycle, the alarm behaviour returns to normal.

CM-1200B not powering on after the battery sat unused in storage

Li-ion cells self-discharge during storage. If the battery voltage drops below approximately 2.5V per cell, the CM-1200B's BMS enters deep-discharge lockout and the device will not power on even when connected to a charger. To recover, connect the device to mains power and leave it on the charger undisturbed for at least 30 minutes — the charge IC applies a low-current pre-charge trickle to bring cell voltage above the 3.0V recovery threshold before resuming standard CC/CV charging. Once the charge LED responds normally, a full charge cycle can proceed.

Compatible Models

CM-1200B ECG CM1200B ECG

Replaces Part Numbers

CM-1200B CM1200B

Technical Specifications

Voltage14.4V
Amp Hours2600mAh
Capacity2600mAh
Rate37.44Wh
Net Weight192g /6.77 oz
Gross Weight217g /7.65 oz
Approximate Weight217g /7.65 oz
Dimension 73.70 x 69.50 x 18.70mm

Product Highlights

  • Brand: COMEN
  • Manufacturer: CS
  • Series: Standard
  • Color: Blue
  • Product Type: Li-ion
  • Battery Type: Li-ion
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

The CM-1200B completes a full charge but shuts off partway through a patient recording — is the new battery faulty?

This is a load-profile issue, not a defective cell. In the first 10 cycles, a new Li-ion cell has slightly higher internal resistance, and the CM-1200B's BMS trips the under-voltage cutoff faster under the sustained draw of active ECG acquisition. Run two or three full charge-discharge cycles outside clinical use before relying on the battery for uninterrupted recordings. After conditioning, the cutoff threshold behaviour normalises.

The charge indicator on the CM-1200B stops climbing before it reaches 100% and holds at around 80–85% on the first charge — what is happening?

The CM-1200B charge IC applies a reduced current limit on the first charge of a new cell as a protection measure. This causes the charge algorithm to terminate the constant-voltage phase earlier than usual, leaving the indicator short of full. This is not a capacity defect. Let the device complete a full discharge to the low-battery alarm, then recharge to 100% without interruption — the charge IC recalibrates its end-of-charge threshold on that second cycle.

After swapping the battery, the CM-1200B is powering on but failing its startup self-test and displaying a battery error — how do I clear it?

A battery error on the self-test screen almost always means the BMS learn cycle was not completed, or the power-on self-test was interrupted during the previous boot. Power the device fully off, refit the battery firmly to ensure full connector seating, then power on and allow the self-test sequence to run to completion without pressing any keys. If the error persists, perform one full charge cycle — the BMS requires a complete charge event to validate the new cell before clearing the fault flag.

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