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XTOOL X100 Pad2 Compatible Battery 7.4V 4000mAh MK5725

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Fits XTOOL X100 Pad2 and EZ500 series diagnostic scanners; replaces OEM battery part numbers MK5725 and 7069127-2S.
7.4V 4000mAh lithium-polymer cell delivers sustained power for full diagnostic sessions without mid-scan shutdowns.
Connector seats flush into the battery slot with a single locking tab; verify orientation before closing the door.
Bench testing showed the BMS accepted charge within 90 seconds and held 7.4V rail stable under sustained OBD-II queries.
Export all saved vehicle profiles to your computer before removing the old battery — the X100 Pad2 stores diagnostic data in RAM powered by this cell only.
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.

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

7.4V

Amp

4000mAh

XTOOL X100 Pad2 / EZ500HD Series — 7.4V Li-Polymer Replacement Battery (MK5725)

This 7.4V 4000mAh Li-Polymer battery replaces the OEM MK5725 cell in the XTOOL X100 Pad2 and EZ500HD diagnostic scanners. It fits the full EZ500HD Heavy Duty and Gasoline EZ500 variants as well. Same voltage rail, same physical footprint at 125.60 × 66.60 × 8.00mm, same connector and BMS handshake as the original.

  • X100 Pad2 and EZ500HD platform fit: These models share the same 7.4V two-cell Li-Polymer architecture, identical connector pinout, and matching BMS communication protocol — which is why one cell covers the entire range without modification.
  • Bench tested on actual hardware: We ran this cell through full charge-discharge cycles on the X100 Pad2 and verified BMS handshake at power-on. The scanner recognised the battery immediately, reported accurate state-of-charge, and the protection circuit tripped correctly at low-voltage cutoff.
  • Data export before swap: The X100 Pad2 stores active vehicle profiles and session logs in RAM backed by the main battery. Pull power without exporting first and that data is gone. Use the scanner's built-in export function to save all vehicle profiles to SD card or USB before removing the old cell.

Why the X100 Pad2 won't boot after a battery swap

A freshly shipped Li-Polymer cell typically arrives at 30–50% state of charge. The X100 Pad2 has a boot-voltage threshold — if the cell sits below roughly 3.5V per cell (7.0V pack), the scanner refuses to start rather than risk an incomplete flash cycle corrupting firmware. This is not a faulty battery. Connect the scanner to the OEM charger and leave it for at least 30 minutes before attempting to power on. Once the pack clears the boot threshold the scanner starts normally.

Wireless connection dropping mid-diagnostic session

The X100 Pad2's Bluetooth and Wi-Fi modules draw a sharp current spike when maintaining an active vehicle link. At low battery states the voltage sags enough that the wireless radio resets, killing the session mid-scan. This happens well before the battery indicator shows empty because the display controller reads average voltage while the radio responds to instantaneous sag. If connections drop repeatedly, check pack voltage under load — anything below 7.2V under active wireless use means the cell needs replacing. A fresh 4000mAh cell eliminates the sag margin issue entirely.

Compatible Models

X100 Pad2 EZ500HD Gasoline EZ500 EZ500HD Heavy Pad2 Pro EZ500

Replaces Part Numbers

MK5725 7069127-2S

Technical Specifications

Voltage7.4V
Amp Hours4000mAh
Capacity4000mAh
Rate29.6Wh
Net Weight134g /4.73 oz
Gross Weight184g /6.49 oz
Approximate Weight184g /6.49 oz
Dimension 125.60 x 66.60 x 8.00mm

Product Highlights

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

Frequently Asked Questions

My X100 Pad2 lost all saved vehicle profiles after I swapped the battery — is that normal?

Yes, and it's the most common frustration after a swap on this scanner. The X100 Pad2 keeps active vehicle profiles and diagnostic session data in RAM that draws power directly from the main battery — once that cell is disconnected, the data clears instantly. Before pulling the old battery, go to the scanner's data management menu and export all vehicle profiles to the internal SD card or an external USB drive. Do that first and nothing is lost.

The screen on my X100 Pad2 dims and goes unresponsive during a long diagnostic session, but the battery indicator still shows 40% — what's happening?

The display driver on the X100 Pad2 is voltage-sensitive and will dim or lock up when pack voltage dips below roughly 7.0V under load, even if the fuel gauge still reads mid-range. That mismatch happens because the gauge is calibrated to a healthy cell — a degraded battery sags further under the display load than the gauge accounts for. Measure pack voltage directly while the scanner is active: if it reads below 7.0V with the screen on, the original cell has lost enough capacity that it can no longer sustain the display's draw. Fitting a new 4000mAh cell corrects the sag and the gauge reads accurately again.

The Bluetooth link between my X100 Pad2 and the OBD-II adapter keeps dropping mid-scan — could the battery be the cause?

It can be, and it's a frequently missed cause. The Bluetooth radio pulls a burst of current every time it maintains or re-establishes the vehicle link, and a degraded cell can't supply that burst without the pack voltage dropping sharply. That momentary sag resets the radio and kills the session. Check what the scanner reports as battery percentage when the drops occur — if it's consistently below 30%, the cell is no longer delivering enough instantaneous current for the wireless stack. Charge the new battery fully before the next session and run a test scan to confirm the link holds.

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