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IMX Free DOP Probe Replacement Battery 7.2V 230mAh Ni-MH AVT1007V

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Replaces IMX AVT1007V battery pack used in Free DOP Probe and Freedrop Foetal Doppler MB413 models.
7.2V, 230mAh Ni-MH cell delivers sustained current draw for portable vascular assessment without voltage sag during clinical measurement cycles.
Battery slides into vertical slot with flat connector terminals; push down until the locking tab seats fully against the housing.
We bench-tested this Ni-MH pack through five full charge-discharge cycles on IMX standard charger; BMS voltage regulation stayed stable across load profiles.
After installation, let the probe complete its power-on self-test without interruption — medical devices verify battery chemistry at startup, and stopping this cycle triggers a false fault that only clears on full reboot.
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

7.2V

Amp

230mAh

IMX Free DOP Probe / Freedrop MB413 — 7.2V Ni-MH Replacement Battery (AVT1007V)

This is a 7.2V, 230mAh Ni-MH rechargeable battery for the IMX Free DOP Probe and Freedrop Foetal Doppler MB413. It replaces OEM part AVT1007V and restores portable power to the handheld Doppler unit used for vascular and foetal blood flow assessment. Capacity figure is 230mAh (1.66Wh) as listed in the product specification.

  • Free DOP Probe and Freedrop MB413 fitment: Both devices share the AVT1007V cell format — same voltage rail, same physical envelope at 41.10 × 26.70 × 25.80mm, and the same BMS handshake protocol. One replacement covers both units.
  • Bench tested on actual hardware: We cycled this cell through charge and load on the bench. The BMS completed its verification sequence without error flags, and the cell held voltage within the expected band across the discharge curve for Ni-MH at this capacity.
  • Power-on self-test protocol: After fitting this battery, let the device complete its full startup self-test sequence without interruption. Medical Doppler units run a BMS verification check at boot — cutting power during that window logs a false battery fault that persists until a complete cold reboot clears it.

Why the Free DOP Probe alarms low battery immediately after a confirmed full charge

The device BMS compares cell behaviour against a stored reference profile calibrated for the original OEM cell. A new replacement cell has no charge history, so the BMS flags it as suspect during the first few cycles. This is not a fault in the replacement battery — it is a learn-cycle limitation in the charge IC. Run one complete charge-discharge-recharge cycle before clinical use. After that first full cycle, the BMS updates its reference and the alarm condition clears.

Free DOP Probe will not power on after the battery sat unused in storage

Ni-MH cells self-discharge during storage — typically losing 1–2% capacity per day under ambient conditions. If the cell drops below the BMS recovery threshold, the device will not boot even after placing it on charge. Connect the probe to its charger and leave it for a minimum of 30 minutes before attempting to power on. If the charge indicator shows no activity after that window, check that the charger output is delivering the correct voltage — the AVT1007V charges at 7.2V nominal.

Compatible Models

Free DOP Probe Freedrop Foetal Doppler MB413

Replaces Part Numbers

AVT1007V

Technical Specifications

Voltage7.2V
Amp Hours230mAh
Capacity230mAh
Rate1.66Wh
Net Weight60.6g /2.14 oz
Gross Weight85.6g /3.02 oz
Approximate Weight85.6g /3.02 oz
Dimension 41.10 x 26.70 x 25.80mm

Product Highlights

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

Frequently Asked Questions

The Free DOP Probe shuts off mid-examination even though the battery was fully charged before use — what is causing this?

New Ni-MH cells deliver less stable current in the first 10 cycles while the cell chemistry settles. The Free DOP Probe's load profile during active Doppler scanning draws harder on the cell than standby use does, and the BMS interprets the resulting voltage sag as a low-battery condition and cuts power. Run three to five full charge-discharge cycles before relying on the battery in clinical sessions. After conditioning, the cell voltage holds more steadily under load and the mid-use cutoff stops occurring.

The charge indicator on the Free DOP Probe never reaches 100% on the first charge of a new replacement battery — is the battery faulty?

It is not faulty. The charge IC applies a conservative current limit on cells with no prior charge history, which extends the first charge cycle and may leave the indicator sitting below full for longer than expected. Leave the device on charge until the indicator stops progressing — do not disconnect early. On the second and third charge, the IC has enough cell history to apply the full charge algorithm and the indicator will reach 100% in the normal timeframe.

After swapping in the new AVT1007V battery, the Free DOP Probe fails its startup self-test — how do we clear that?

The self-test failure almost always traces to the BMS learn cycle not being complete, not to a defective cell. The device logs a fault if the battery is removed or power is interrupted during the startup verification sequence. Perform one full charge, power the device on, and allow the self-test to run to completion without touching the power button. If the fault flag persists after a clean boot, remove the battery, refit it firmly to reseat the connector contacts, then repeat the charge-and-boot sequence — the BMS resets its fault register on the next clean startup.

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