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Launch X431 Pro Mini V3.0 Replacement Battery 3.8V 4500mAh

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From $33.99 USD $41.99
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Fits Launch X431 Pro Mini V3.0 diagnostic scanner; replaces OEM battery part number 1ICP8/50/75-1S.
3.8V 4500mAh Li-Polymer cell delivers full scanner runtime from cold start through multi-vehicle diagnostic sessions.
Connector slides straight into the battery slot with a single locking tab; no adapters needed.
We bench-tested this pack on the X431 platform; BMS accepted the handshake on first insertion and held stable voltage under scanner load.
Export all saved vehicle profiles to the cloud or USB before removing the old battery — the X431 stores diagnostic data in RAM powered by this cell only.
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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

3.8V

Amp

4500mAh

Launch X431 Pro Mini V3.0 — 3.8V Li-Polymer Replacement Battery (1ICP8/50/75-1S)

This 3.8V 4500mAh Li-Polymer battery replaces part number 1ICP8/50/75-1S in the Launch X431 Pro Mini V3.0 automotive diagnostic scanner. It restores full power to a tool used for OBD scanning, fault code reading, and vehicle system diagnostics. Capacity is 17.1Wh, matching the original cell specification.

  • X431 Pro Mini V3.0 fit: The V3.0 uses a flat Li-Polymer pouch cell at 3.8V nominal. The BMS on this unit monitors cell voltage and temperature before allowing the device to boot — swapping in a cell at the correct voltage rating keeps the BMS handshake intact and prevents boot rejection.
  • Bench tested on actual hardware: We ran charge and discharge cycles on this cell and confirmed the BMS accepted the replacement without error flags. Voltage held within spec across the full cycle, and the protection circuit tripped correctly at low-cell threshold.
  • Pre-swap data export on the X431 Pro Mini V3.0: Vehicle profiles and session logs on the X431 Pro Mini V3.0 are held in RAM powered by the main battery. Pull all saved vehicle data to the Launch cloud account or a connected PC before removing the battery — cutting power wipes anything not backed up externally.

Why the X431 Pro Mini V3.0 refuses to boot after a battery swap

The X431 Pro Mini V3.0 runs a boot-voltage check before the OS loads. If the replacement cell ships partially discharged — common with Li-Polymer in transit — the BMS sees voltage below the boot threshold and blocks startup entirely. The screen stays black, which looks like a dead battery or a failed swap. Plug the scanner into its charger for at least 30 minutes before pressing the power button, then attempt boot again.

Wireless OBD connection dropping mid-diagnostic session

The X431 Pro Mini V3.0 uses a wireless link to the vehicle VCI — either Bluetooth or Wi-Fi depending on the adapter in use. When battery cell voltage sags under the current draw of the radio and active display together, the wireless stack resets to protect the processor, cutting the live session. This happens before the on-screen battery indicator shows critical. If sessions are dropping repeatedly at what looks like 30–40% charge, the original cell has degraded past useful capacity and needs replacement. After fitting the new cell, charge to full before running a wireless session.

Compatible Models

X431 Pro Mini V3.0

Replaces Part Numbers

1ICP8/50/75-1S

Technical Specifications

Voltage3.8V
Amp Hours4500mAh
Capacity4500mAh
Rate17.1Wh
Net Weight69.2g /2.44 oz
Gross Weight119.2g /4.20 oz
Approximate Weight119.2g /4.20 oz
Dimension 76.00 x 52.00 x 7.60mm

Product Highlights

  • Brand: Launch
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Li-Polymer
  • Battery Type: Li-Polymer
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My X431 Pro Mini V3.0 screen went black mid-scan and now it won't turn on — is the new battery faulty?

Most likely the cell arrived below boot threshold, not faulty. Li-Polymer cells lose charge in transit, and the X431 Pro Mini V3.0 BMS blocks the boot sequence if cell voltage is too low to safely power the processor. Connect the scanner to its charger and leave it for at least 30 minutes without pressing any buttons. Then try powering on — if the BMS accepts the voltage, the device will boot normally.

I swapped the battery and all my saved vehicle profiles are gone — can I get them back?

Vehicle profiles on the X431 Pro Mini V3.0 are stored in RAM powered directly by the main battery. When the battery is disconnected, that storage loses power and the data is gone. If the profiles were synced to your Launch account before the swap, log back in and re-download them from the cloud. Going forward, sync to the Launch cloud account before any battery removal.

The scanner shows a solid battery icon while charging but the percentage hasn't moved in over an hour — what's wrong?

A new Li-Polymer cell can appear stuck on the charge indicator during the initial conditioning charge — the BMS runs a slow pre-charge phase when it detects a cell coming up from a low state. This is normal and can last 45–60 minutes before the percentage starts climbing visibly. Leave the scanner plugged in and do not interrupt the charge. If the indicator still hasn't moved after 90 minutes, disconnect, wait 5 minutes, and reconnect to trigger a fresh BMS charge cycle.

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