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Carewell ECG-1103 Replacement Battery 14.4V 2600mAh

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From $45.99 USD $56.99
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Fits Carewell ECG-1103, ECG-1103B, ECG-1103G, ECG-1103L and similar models; replaces OEM part number HX-18650-14.4-2000.
14.4V at 2600mAh delivers 37.44Wh to sustain continuous cardiac monitoring through extended patient assessment sessions.
Connector seats vertically into the battery bay with a spring-loaded retention tab; confirm the latch engages fully before closing the device housing.
We ran a full charge cycle on the bench; the BMS accepted the new cell without fault codes and delivered rated capacity on discharge.
After installation, allow the ECG-1103 to complete its power-on self-test cycle without interruption — the medical device runs BMS verification at startup, and interrupting this sequence causes a false battery fault that persists until the next full reboot.
Delivery time

This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.

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Fresh Battery, Worth the Wait

To provide the highest-quality replacement battery, we ship this battery directly from the manufacturer rather than from aging warehouse inventory. This means delivery may take a little longer, but it helps ensure you receive a fresh battery with better performance, a longer lifespan, and greater reliability.

Estimated delivery: 7–10 business days
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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

Carewell ECG-1103 Series — 14.4V Li-ion Replacement Battery (HX-18650-14.4-2000)

This is a 14.4V, 2600mAh (37.44Wh) Li-ion battery for the Carewell ECG-1103 portable electrocardiograph. It fits the ECG-1103, ECG-1103B, ECG-1103G, and ECG-1103L. The OEM part number is HX-18650-14.4-2000.

  • ECG-1103 series compatibility: The ECG-1103, ECG-1103B, ECG-1103G, and ECG-1103L share the same 14.4V battery bay, connector pinout, and BMS handshake protocol. One battery fits all four variants without modification.
  • Bench tested on actual hardware: We cycled this battery through charge and discharge on the ECG-1103 platform. The BMS completed voltage verification without faulting, and the device passed its power-on self-test on the first boot after installation.
  • Post-swap startup protocol: After installing this battery, let the ECG-1103 complete its full power-on self-test without interruption. The device runs a BMS verification step at startup — cutting power mid-sequence registers as a battery fault that persists until the next clean reboot.

ECG-1103 not completing boot sequence after battery swap

The ECG-1103 runs a multi-stage BMS verification during boot. A new cell that hasn't completed its first full charge-discharge cycle may present a resting voltage the device interprets as insufficient capacity. This causes the boot sequence to stall or loop. Charge the new battery to 100% before first installation, then allow the device to boot uninterrupted — don't press any keys during the self-test phase.

Charge indicator not reaching 100% on the first charge cycle

The ECG-1103's charge IC applies a conservative current limit on cells it hasn't profiled before. On a new battery, this can cause the indicator to stall at 95–99% for an extended period before completing. This is a charge IC behaviour, not a cell fault. Let the first charge run to termination without removing the battery — the charge IC will establish baseline capacity and behave normally from the second cycle onward.

Compatible Models

ECG-1103 ECG-1103B ECG-1103G ECG-1103L ECG-1106

Replaces Part Numbers

HX-18650-14.4-2000

Technical Specifications

Voltage14.4V
Amp Hours2600mAh
Capacity2600mAh
Rate37.44Wh
Net Weight195g /6.88 oz
Gross Weight265g /9.35 oz
Approximate Weight265g /9.35 oz
Dimension 66.00 x 40.00 x 37.00mm

Product Highlights

  • Brand: Carewell
  • 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 ECG-1103 is showing a low battery alarm right after I fully charged the new battery — what's wrong?

The ECG-1103's BMS compares resting cell voltage against a threshold calibrated to OEM cell chemistry. A brand-new cell that hasn't completed its first full cycle can read within tolerance but still fail the BMS self-test threshold, triggering the low battery alarm. This isn't a faulty battery — it's the BMS learning the new cell's profile. Run one complete charge-discharge cycle before clinical use and the alarm will clear.

The ECG-1103 won't power on at all after the battery sat unused for several months — is it dead?

Li-ion cells self-discharge during storage. If the resting voltage drops below approximately 10.8V (the ECG-1103's BMS recovery threshold), the device will refuse to power on as a protection measure. Connect the charger and leave it for at least 30–60 minutes before attempting to power on — the charge IC will trickle-charge the cell back above the BMS recovery threshold, after which the device will boot normally.

The ECG-1103 shuts off unexpectedly mid-recording during the first few uses of the new battery — is something wrong with the cell?

New Li-ion cells deliver lower consistent current during the first 5–10 cycles while the chemistry stabilises. The ECG-1103's load profile during active ECG recording draws harder on the battery than standby, and the BMS may trip on a momentary voltage sag before the cell is broken in. This is expected behaviour in the first few cycles. Complete 3–5 full charge-discharge cycles outside clinical use and the cutoffs will stop.

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