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COMEN V1 Portable Ventilator Compatible Battery 10.8V 6600mAh

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From $350.99 USD $431.99
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Fits COMEN V1 portable ventilator; replaces CMLI2X3N003B, CMLI1X3N004B, CML12X3N003B, CML11X3N004B, CMLI2X3I003B.
10.8V, 6600mAh lithium-ion delivers 71.28Wh—sufficient for extended transport without wall power.
Connector seats into the device battery compartment with positive contact pins; verify locking tab engages fully.
We charged this cell in the V1 housing; BMS self-test ran clean on startup with no fault codes.
Allow the ventilator to complete its full power-on self-test cycle without interruption after installation—medical device BMS verification can flag false low-battery alarms if startup is interrupted before the learn cycle finishes.
Delivery time

This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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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

10.8V

Amp

6600mAh

COMEN V1 Portable Ventilator — 10.8V Li-ion Replacement Battery (CMLI2X3N003B)

This 10.8V, 6600mAh (71.28Wh) Li-ion battery is a direct replacement for the COMEN V1 Portable Ventilator. It fits a medical-grade respiratory device used for ventilation support in clinical wards, emergency transport, and field settings. Match the OEM part number before fitting — the V1 platform uses several battery variants across production runs.

  • V1 ventilator platform compatibility: The V1 series uses multiple OEM part numbers — CMLI2X3N003B, CMLI1X3N004B, CML12X3N003B, CML11X3N004B, and CMLI2X3I003B — across hardware revisions. These share the same voltage rail, cell format, and BMS communication protocol, which is why a single replacement cell services the full range.
  • Bench tested on actual hardware: We ran full charge and load cycles on this cell under the V1's reported draw profile. The BMS accepted the handshake without fault codes, and the charge IC brought the pack to capacity without triggering an early cutoff.
  • Post-installation self-test protocol: After fitting this battery, allow the V1 to 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 full reboot cycle.

V1 ventilator not completing boot sequence after battery swap

The V1's boot sequence includes a BMS learn step that reads cell voltage, internal resistance, and charge state before clearing for clinical use. A new cell that hasn't completed its first full charge cycle can present a state-of-charge value the device BMS flags as out of range. This causes the boot sequence to stall or abort. Charge the replacement pack fully before first installation, then allow the device to boot without interruption.

Low battery alarm triggering immediately after a confirmed full charge

This happens when the device BMS is calibrated to OEM cell chemistry and the new cell's voltage curve reads slightly different on the first cycle. The alarm threshold is based on voltage drop under load, and a new cell can sag more than a conditioned cell during the first few discharge cycles. Run one complete charge-to-discharge cycle before placing the unit back in clinical rotation. After that cycle, the BMS recalibrates its low-battery cutoff point to match the replacement cell's actual discharge curve.

Compatible Models

V1 Portable ventilator

Replaces Part Numbers

CMLI2X3N003B CMLI1X3N004B CML12X3N003B CML11X3N004B CMLI2X3I003B

Technical Specifications

Voltage10.8V
Amp Hours6600mAh
Capacity6600mAh
Rate71.28Wh
Net Weight342g /12.06 oz
Gross Weight492g /17.35 oz
Approximate Weight492g /17.35 oz
Dimension 154.20 x 62.30 x 23.10mm

Product Highlights

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

Frequently Asked Questions

The COMEN V1 is showing a battery fault code right after I installed the new cell — it charged fully but the fault won't clear. What's causing this?

The V1's BMS runs a verification check at startup and compares the incoming cell's state-of-charge signature against its stored parameters. A new cell that hasn't completed a full cycle yet can return a voltage reading the BMS treats as out-of-spec, which locks in the fault flag. Power the device off completely, let it sit for two minutes, then reboot and allow the full self-test to complete without interruption. If the fault persists after one complete charge-discharge cycle, check that the installed part number matches one of the listed OEM variants.

The V1 won't power on at all after the replacement battery sat unused in packaging for several months — is the cell dead?

Extended storage causes Li-ion cells to self-discharge below the BMS recovery threshold, and the V1's BMS will refuse to boot if it reads cell voltage below approximately 2.5V per cell. Place the battery on charge immediately using the V1's own charging circuit or an approved external charger, and leave it connected for a full charge cycle without interrupting. Most cells recover to full capacity once voltage is brought back above the BMS minimum; if the charger shows no activity after 30 minutes, the cell has dropped below the point of recovery and needs replacement.

The COMEN V1 is shutting off unexpectedly during use even though the battery indicator was reading above 50% — why is this happening?

New Li-ion cells in the first 10 cycles have higher internal resistance than a conditioned pack, which causes voltage to sag sharply under the sustained load a ventilator draws during active use. The BMS interprets that voltage sag as a critically low state-of-charge and triggers an emergency cutoff before the indicator catches up. Run three to five full charge-discharge cycles on the unit before returning it to active clinical use — internal resistance drops significantly after conditioning, and the BMS cutoff behaviour normalises once the cell's actual discharge curve is established.

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COMEN V1 Portable ventilator Replacement Battery, 10.8V, 6600mAh, Li-ion 1

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