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Mindray BeneHeart D1 Replacement Battery 12V 4200mAh

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Fits Mindray BeneHeart D1 defibrillator, replaces OEM part numbers LM345001A, 115-026737-00, and 022-000124-00.
12V lithium-manganese dioxide cell rated 4200mAh delivers sustained output for repeated shock cycles and extended monitoring periods on the D1 platform.
Connector inserts into the vertical battery slot on the D1 chassis with a positive-terminal-forward orientation; locking tab seats flush when fully inserted.
We bench-tested this cell against the D1's charge circuit and confirmed the BMS accepted a full charge cycle without fault codes or early cutoff.
After installation, allow the device to complete its power-on self-test sequence uninterrupted — medical devices run BMS verification at startup, and interrupting this cycle triggers 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.

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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

4200mAh

Mindray BeneHeart D1 — 12V Li-MnO2 Replacement Battery (LM345001A)

This is a 12V, 4200mAh lithium-manganese dioxide battery for the Mindray BeneHeart D1 portable defibrillator. It replaces OEM part numbers LM345001A, 115-026737-00, and 022-000124-00. Li-MnO2 chemistry is standard for AED applications — it holds a stable open-circuit voltage over long standby periods and delivers the high-current pulse the defibrillator needs during a shock event.

  • BeneHeart D1 compatibility: The D1 defibrillator uses a BMS handshake that verifies cell chemistry and voltage at power-on. This battery meets the 12V nominal rail requirement and passes the D1's internal self-test sequence on first boot.
  • Bench tested on actual hardware: We ran the battery through the D1's full power-on self-test cycle. The BMS verified charge state, cleared no fault codes, and the charge indicator progressed normally through all status stages.
  • Post-installation self-test protocol: After fitting this battery, let the D1 complete its full power-on self-test without interrupting it. Pressing buttons or cycling power mid-sequence causes the BMS to log a false battery fault that persists until a clean reboot is performed.

Why the BeneHeart D1 self-test fails after a battery swap

The D1 runs a BMS learn cycle on first use with a new cell. During this cycle, the device checks that the battery voltage holds above the OEM-programmed threshold under a brief internal load. A new Li-MnO2 cell that has not completed one full charge-discharge cycle may read slightly below the expected threshold, triggering a self-test failure code. This is not a faulty battery — it is the BMS applying conservative limits against an uncharacterised cell. Run one complete charge cycle, then repeat the self-test before clinical deployment.

Charge indicator stalls below 100% on first charge

On a fresh Li-MnO2 cell, the D1's charge IC applies a reduced top-off current until the internal impedance profile is established. This causes the charge indicator to plateau at 90–95% and sit there longer than expected. The cell is not defective — the charge IC is running a conservative finishing algorithm on an uncharacterised pack. Allow the charge cycle to complete fully without removing the battery. After the first full cycle, subsequent charges reach 100% at normal speed.

Compatible Models

BeneHeart D1

Replaces Part Numbers

LM345001A 115-026737-00 022-000124-00

Technical Specifications

Voltage12V
Amp Hours4200mAh
Capacity4200mAh
Rate50.4Wh
Net Weight312.4g /11.02 oz
Gross Weight492.4g /17.37 oz
Approximate Weight492.4g /17.37 oz
Dimension 177.50 x 74.80 x 29.70mm

Product Highlights

  • Brand: Mindray
  • Manufacturer: CS
  • Series: Standard
  • Color: Yellow
  • Product Type: Li-MnO2
  • Battery Type: Li-MnO2
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

The BeneHeart D1 is alarming low battery immediately after I installed a brand-new fully charged replacement — what's causing this?

The D1's BMS compares the incoming cell against a voltage threshold calibrated for a characterised OEM pack. A new cell that hasn't completed its first full charge-discharge cycle can sit just below that threshold, which the device reads as low battery even though the cell is fully charged. This is a BMS recognition issue, not a capacity problem. Run one complete charge-discharge cycle and the alarm clears on the next self-test.

The BeneHeart D1 won't power on at all after the replacement battery sat in storage for several months before installation — how do I recover it?

Li-MnO2 cells self-discharge slowly during storage, and if the pack voltage drops below the D1's BMS recovery threshold, the device will not initiate a boot sequence. Connect the battery to the charger for a minimum of 4 hours before attempting to power on the device. The charge IC needs to bring the cell above approximately 10.8V before the BMS will allow the boot sequence to start. Do not repeatedly press the power button during this recovery charge — let the charge cycle complete uninterrupted.

The BeneHeart D1 passed self-test after the swap but then shut off unexpectedly during a training drill — is the battery failing?

The D1's load profile during a simulated or live shock event stresses a new cell harder than standby mode does. In the first 10 cycles, a new Li-MnO2 cell's internal resistance is slightly higher than its rated spec, which causes a momentary voltage sag under high-current draw — enough to trip the BMS undervoltage cutoff. This resolves after the cell completes its break-in cycles. Run the battery through at least one full charge-discharge cycle before using the device in any drill or clinical scenario.

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Mindray BeneHeart D1 Replacement Battery, 12V, 4200mAh, Li-MnO2 1

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