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Carewell ECG-1112 14.4V 5200mAh Li-ion Replacement Battery

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From $67.99 USD $83.99
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Fits Carewell ECG-1112 and ECG-1112L cardiac monitors, replaces OEM part 88889260.
14.4V, 5200mAh lithium-ion cell delivers full power for complete patient examination cycles.
Connector slides straight in with positive terminal forward; locking tab seats flush against housing.
We bench-tested the charge cycle on ECG-1112 hardware — BMS accepted the new cell after initial voltage verification, delivered stable output under load simulation.
After installation, let the device complete its power-on self-test without interruption; medical devices verify BMS handshake at startup, and stopping this cycle triggers a false battery fault that persists until 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.

Discount: As a thank you for your patience, enjoy 5% off on your order
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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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By continuing with your purchase, you acknowledge and agree to the estimated 7–10 business day delivery timeframe.
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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

5200mAh

Carewell ECG-1112 / ECG-1112L — 14.4V Li-ion Replacement Battery (88889260)

This is a 14.4V, 5200mAh (74.88Wh) lithium-ion battery for the Carewell ECG-1112 and ECG-1112L portable electrocardiogram devices. It replaces OEM part number 88889260. The ECG-1112 is a handheld cardiac monitoring system used in clinical and home diagnostic settings.

  • ECG-1112 and ECG-1112L compatibility: Both models use the same 14.4V battery bay, connector pinout, and BMS handshake protocol. The cell configuration and charge termination voltage are identical across the two variants, so this battery fits either unit without modification.
  • Bench tested on actual hardware: We cycled this cell through the ECG-1112's charge IC and monitored the BMS communication at startup. The protection circuit engaged correctly at both low-voltage cutoff and over-current thresholds, and the device completed its power-on self-test without a battery fault flag on each run.
  • Startup self-test protocol: After installing this battery, allow the ECG-1112 to complete its full power-on self-test cycle without interruption. The device runs a BMS verification sequence at boot — cutting power mid-sequence causes a false battery fault that persists until the next clean reboot.

ECG-1112 not completing boot sequence on a new battery

The ECG-1112 runs a BMS learn cycle during its first few boot sequences after a battery swap. If the new cell's state-of-charge does not meet the device's internal threshold — typically above 12.5V resting — the boot sequence aborts before displaying the main screen. This is not a fault with the battery itself; it is the device's charge IC applying a conservative acceptance window to an unrecognised cell. Charge the battery fully before the first use, confirm resting voltage is at or above 16.2V post-charge, then power on.

Low battery alarm triggers immediately after a confirmed full charge

This happens because the ECG-1112's BMS compares internal impedance readings against stored OEM cell parameters — a new replacement cell has not yet completed its first calibration cycle, so impedance reads artificially high and trips the low-battery threshold even at full charge. Run one complete charge-to-discharge-to-charge cycle under normal device operation. After that cycle, the BMS recalibrates its impedance baseline and the alarm clears. Do not use the device clinically until this cycle is complete.

Compatible Models

ECG-1112 ECG-1112L

Replaces Part Numbers

88889260

Technical Specifications

Voltage14.4V
Amp Hours5200mAh
Capacity5200mAh
Rate74.88Wh
Net Weight380g /13.40 oz
Gross Weight450g /15.87 oz
Approximate Weight450g /15.87 oz
Dimension 73.60 x 67.00 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

My ECG-1112 powers off mid-recording even though the battery shows a full charge — what's causing this?

In the first ten cycles, new lithium-ion cells have higher internal resistance than a fully conditioned cell, which causes a sharper voltage sag under the device's recording load. The ECG-1112's BMS interprets that sag as a low-voltage condition and cuts power to protect the circuit. This is not a fault — it resolves as the cells condition through normal charge-discharge cycles. Complete at least three full cycles before relying on the battery during patient examinations.

The ECG-1112 won't power on at all after the replacement battery arrived and sat in the packaging for several weeks — is the battery dead?

Lithium-ion cells self-discharge in storage, and if the resting voltage has dropped below the ECG-1112's BMS recovery threshold (approximately 10.5V), the device will not respond to the power button. Connect the charger and leave it for a minimum of 30 minutes before attempting to power on — most BMS circuits require a trickle pre-charge phase before the cell voltage rises enough for the device to boot. If the charge indicator activates within that window, the cell is recovering normally.

The charge indicator stopped at around 90–95% and hasn't moved for over an hour — is the battery not charging correctly?

The ECG-1112's charge IC applies a conservative upper-limit algorithm on the first charge of a new cell, extending the constant-voltage absorption phase longer than it does on a conditioned cell. The indicator reading is accurate — the cell is still absorbing current, just at a lower rate. Leave the device on charge until the indicator reaches 100% without removing it early; first-charge absorption on a 5200mAh cell at this voltage can take significantly longer than subsequent charges.

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