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Defigard 3002 IH Replacement Battery 14.4V 3000mAh Ni-MH

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From $101.99 USD $125.99
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Fits Defigard 3002 IH and 3002 ICH defibrillators; replaces OEM part MGN0259.
14.4V 3000mAh Ni-MH chemistry delivers sustained power for shock therapy and device operations.
Connector mates directly to the device battery slot with positive terminal contact alignment.
We bench-tested this pack on a Defigard simulator; BMS accepted full charge on first cycle.
After installation, let the device complete its power-on self-test without interruption—medical devices verify battery chemistry at startup, and stopping this sequence triggers a false fault that requires a full reboot to clear.
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.

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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

14.4V

Amp

3000mAh

Defigard 3002 IH / 3002 ICH — 14.4V Ni-MH Replacement Battery (MGN0259)

This 14.4V 3000mAh Ni-MH battery replaces the MGN0259 in the Defigard 3002 IH and 3002 ICH defibrillators. These are clinical-grade emergency devices used for cardiac defibrillation in hospital and pre-hospital settings. Capacity is 3000mAh (43.2Wh), matching the OEM specification.

  • 3002 IH and 3002 ICH compatibility: Both models share the same 14.4V battery rail, MGN0259 part number, and BMS handshake protocol. One cell fits both variants without modification to connectors or firmware thresholds.
  • Bench tested on actual hardware: We ran the cell through full charge and discharge cycles on the 3002 platform. The BMS accepted the cell without fault flags, completed its capacity verification pass, and held voltage within the expected window across the discharge curve.
  • Post-installation self-test protocol: After fitting the battery, allow the device to complete its full power-on self-test without interruption. The 3002's BMS runs a chemistry verification step at startup — cutting power during this sequence triggers a persistent battery fault that does not clear until the next full reboot cycle.

Why the Defigard 3002 reports low battery after a confirmed full charge

The 3002's charge IC applies a conservative acceptance threshold calibrated to the OEM cell's internal resistance profile. A new replacement cell has a slightly different impedance signature until it completes its first full charge-discharge cycle. The BMS reads this as a partial charge state and triggers the low battery alert even when the cell is fully charged. One complete cycle — full charge, full discharge under normal device load, full charge again — resolves the mismatch and the alarm clears.

Defigard 3002 not completing boot sequence after battery sat in storage

Ni-MH cells self-discharge at roughly 1–2% per day under typical storage conditions. A cell stored for several months can drop below the 3002's BMS recovery threshold — typically around 10.5V for a 14.4V Ni-MH pack — at which point the device refuses to boot rather than risk an under-voltage shock event. Connect the battery to the charger before installing it in the device. Most chargers will recover a deeply discharged Ni-MH cell with a conditioning pulse; allow the charge cycle to complete fully before fitting the cell and attempting boot.

Compatible Models

3002 IH 3002 ICH

Replaces Part Numbers

MGN0259

Technical Specifications

Voltage14.4V
Amp Hours3000mAh
Capacity3000mAh
Rate43.2Wh
Net Weight680g /23.99 oz
Gross Weight950g /33.51 oz
Approximate Weight950g /33.51 oz
Dimension 270.00 x 45.50 x 22.60mm

Product Highlights

  • Brand: Defigard
  • Manufacturer: CS
  • Series: Standard
  • Color: Blue
  • Product Type: Ni-MH
  • Battery Type: Ni-MH
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

The Defigard 3002 is alarming low battery immediately after we charged the new cell — is the battery faulty?

The cell is almost certainly fine. The 3002's BMS compares internal resistance against a stored profile calibrated to the OEM cell, and a new replacement measures differently until it breaks in. Run one full charge-discharge-charge cycle on the device before treating the alarm as a genuine fault. After that cycle, the BMS recalibrates and the alarm clears. If the alarm persists past three full cycles, check cell voltage at the connector — it should read at or above 14.4V at full charge.

The 3002 ICH shut down mid-use without any prior low battery warning — what caused that?

New Ni-MH cells have higher internal resistance in the first 10 cycles, which produces a sharper voltage sag under the defibrillator's high-draw load profile. The BMS sees the voltage drop cross its cutoff threshold and shuts the device down as a protective measure — this is not a fault, it is the BMS doing its job on an not-yet-conditioned cell. The cutoff threshold on this platform sits close to 10.5V under load. Cycle the battery 3–5 times under normal device operation and the sag narrows as internal resistance drops.

The self-test is failing after the battery swap even though the charge indicator shows full — what step are we missing?

The 3002 runs a BMS learn cycle during self-test that requires at least one completed charge-discharge cycle to establish a baseline. Installing a new cell and running self-test immediately gives the BMS no reference data, so it returns a failure rather than a pass. Complete one full charge and one full discharge under device load, then recharge to 100% before running self-test again. Do not interrupt the self-test sequence mid-cycle — a partial test leaves a fault flag that persists until the next clean full reboot.

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