1. Introduction
The Utrai JS-1 Pro is a versatile and powerful emergency tool designed to jump start 12V vehicles, including passenger cars and motorcycles. Beyond its primary function, it serves as a portable power bank with USB-C output and 10W wireless charging, and features an integrated LED light for various situations. This manual provides essential information for safe and effective use, maintenance, and troubleshooting.
2. Product Overview
The Utrai JS-1 Pro is engineered for convenience and reliability. Key components and features include:
- Main Unit: Compact and rugged design with a digital screen.
- Smart Clamps: Designed for safe connection to vehicle batteries, featuring spark-proof technology.
- Digital Screen: A 2-inch super large informative screen displays battery status (IN/OUT, percentage).
- Wireless Charging Pad: Integrated 10W wireless charging for compatible devices.
- USB-C Output: For charging various electronic devices.
- LED Light: Multi-mode LED light for illumination.
- Compass: Integrated for navigation assistance.


3. Specifications
| Feature | Specification |
|---|---|
| Model | JS-1 Pro |
| Brand | Utrai |
| Capacity | 16000mAh / 59.2Wh |
| Battery Type | High Rate Lithium Battery |
| Peak Starting Current | 2500A |
| Vehicle Compatibility (Gas) | Up to 8.0L |
| Vehicle Compatibility (Diesel) | Up to 7.0L |
| Charging Output | USB-C |
| Wireless Charging | 10W |
| Full Charging Time | 3-4 Hours |
| Operating Temperature | -20°C to 60°C (-4°F to 140°F) |
| Dimensions (L x W x H) | 35cm x 25cm x 20cm (approx.) |
| Weight | 1.5 kg (approx.) |
| Functions | LED Light, Spark Proof, Digital Screen, Jump Start Vehicles |


4. Safety Information
Please read and understand all safety warnings before using the Utrai JS-1 Pro. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Always wear eye protection and gloves when working with batteries.
- Do not allow the smart clamps to touch each other or another metal object once connected to the jump starter.
- Do not jump start a frozen battery.
- Ensure the jump starter is fully charged before use for optimal performance.
- Keep out of reach of children.
- Do not expose the product to rain or extreme moisture.
- Do not disassemble the unit. Refer all servicing to qualified personnel.
- Use only the provided smart clamps and charging cables.
5. Setup
5.1 Charging the Jump Starter
Before first use, fully charge the Utrai JS-1 Pro. Connect the provided USB-C cable to the jump starter's input port and to a suitable USB power adapter (not included). The digital screen will indicate the charging status and battery percentage. A full charge typically takes 3-4 hours.
5.2 Connecting Smart Clamps
Ensure the jump starter is turned off before connecting the smart clamps. Plug the smart clamp connector firmly into the jump starter's output port. The clamps are now ready for use.
6. Operating Instructions
6.1 Jump Starting a Vehicle
- Ensure the Utrai JS-1 Pro is sufficiently charged (preferably above 50%).
- Turn off the vehicle's ignition and all accessories.
- Connect the RED (+) clamp to the positive (+) terminal of the vehicle's battery.
- Connect the BLACK (-) clamp to the negative (-) terminal of the vehicle's battery.
- Ensure the smart clamps are securely attached and not touching any other metal parts.
- Turn on the Utrai JS-1 Pro. The digital screen should indicate readiness.
- Start the vehicle's engine. If it doesn't start immediately, wait 30 seconds and try again. Do not crank for more than 3 seconds per attempt.
- Once the vehicle starts, immediately disconnect the BLACK (-) clamp first, then the RED (+) clamp from the vehicle battery.
- Disconnect the smart clamps from the jump starter.
IMPORTANT: Always connect the RED (+) clamp first and disconnect the BLACK (-) clamp first.
6.2 Using as a Power Bank (USB-C Output)
Connect your electronic device's charging cable to the USB-C output port on the Utrai JS-1 Pro. The jump starter will automatically begin charging your device. The digital screen will show "OUT" indicating power output.
6.3 Using Wireless Charging
Place your Qi-compatible device (e.g., smartphone) on the designated wireless charging pad on the top surface of the Utrai JS-1 Pro. Ensure the device is centered for optimal charging. The digital screen will show a wireless charging icon when active.

6.4 Using the LED Light
Press and hold the power button for a few seconds to turn on the LED light. Short press the power button to cycle through different light modes (e.g., steady, strobe, SOS). Press and hold again to turn off the light.
7. Maintenance
- Recharge After Use: Always recharge the jump starter after each use to maintain battery health and ensure it's ready for the next emergency.
- Regular Charging: If not used frequently, charge the unit every 3-6 months to prevent deep discharge and prolong battery life.
- Cleaning: Wipe the unit with a dry, soft cloth. Do not use harsh chemicals or abrasive cleaners.
- Storage: Store the jump starter in a cool, dry place, away from direct sunlight and extreme temperatures.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Vehicle does not start | Jump starter battery is low. Incorrect clamp connection. Vehicle battery is severely damaged. | Recharge the jump starter. Check clamp polarity and connection. Consult a professional mechanic. |
| Digital screen not turning on | Unit is off or battery is completely drained. | Press the power button. Charge the unit. |
| Wireless charging not working | Device not Qi-compatible. Device not properly aligned. Foreign objects on charging pad. | Ensure device supports Qi wireless charging. Re-position device on the pad. Remove any objects between device and pad. |
| Clamps spark when connecting | This unit features spark-proof technology. If excessive sparking occurs, recheck connections. | Ensure correct polarity and firm connection. If problem persists, consult support. |
9. User Tips
- Keep the jump starter in your vehicle for emergencies, but ensure it's stored in a stable, dry place.
- Regularly check the battery level of the jump starter, especially before long trips.
- In extremely cold conditions, bring the jump starter indoors to warm up slightly before use for optimal performance.
- The compass feature can be useful for general direction finding in unfamiliar areas.
10. Warranty & Support
For warranty information, technical support, or service inquiries, please refer to the contact information provided at the point of purchase or visit the official Utrai website. Keep your purchase receipt as proof of purchase for warranty claims.





