1. Introduction
Thank you for choosing the UTRAI Jstar 5 Car Battery Jump Starter with Air Compressor. This versatile device is designed to provide reliable jump-starting for vehicles, inflate tires, and serve as a portable power bank and emergency light. Please read this manual thoroughly before use to ensure safe and optimal operation.
2. Safety Information
- Always wear eye protection when working with batteries.
- Ensure adequate ventilation during operation.
- Do not smoke or allow sparks or flames near the battery or jump starter.
- Keep the device away from children.
- Connect the jumper clamps correctly: Red to positive (+), Black to negative (-). Incorrect connection can cause damage.
- Do not attempt to jump-start a frozen battery.
- Avoid prolonged use of the air compressor to prevent overheating. Allow it to cool down between uses.
- Do not expose the device to rain or extreme temperatures.
3. Package Contents
Verify that all items are present in your package:
- UTRAI Jstar 5 Jump Starter with Air Compressor
- Smart Jumper Clamps
- USB-C Charging Cable
- DC Car Charger Adapter
- Various Inflation Nozzles
- User Manual
- EVA Protective Carrying Case

4. Product Features
- Powerful Jump Starter: 3500A peak current for 12V vehicles, capable of starting up to 8.0L gas and 8.0L diesel engines.
- High Capacity Battery: 27000mAh internal battery for multiple jump starts and extended power bank use.
- Integrated Air Compressor: 150 PSI maximum pressure with an inflation rate of 45 L/Min, suitable for various tires and inflatables.
- Multi-functional Device: Combines jump starter, air compressor, portable power bank, and emergency LED light in one compact unit.
- 3 LED Light Modes: Features Normal, Flashing, and SOS modes for illumination and emergency signaling.
- Large LED Digital Screen: Provides clear display of battery status, tire pressure, and operational modes.
- Versatile Charging Ports: Includes QC3.0 USB Output (5V-2.4A), Type-C Input (5V-3A, 9V-2A), and EC5 Output.



5. Setup
5.1 Initial Charging
Before first use, fully charge the UTRAI Jstar 5. Connect the USB-C charging cable to the device's Type-C input port and a suitable USB power adapter (not included). The LED screen will indicate the charging status. A full charge is recommended for optimal performance.
5.2 Understanding the Display
The large LED digital screen displays important information:
- Battery Level: Indicates the remaining charge of the internal battery.
- Pressure Units: Displays PSI, BAR, or KPA for the air compressor.
- Output/Input Status: Shows when USB or DC outputs are active, or Type-C input is charging.

6. Operating Instructions
6.1 Jump Starting a Vehicle
- Ensure the jump starter is sufficiently charged.
- Insert the smart jumper cable into the EC5 output port on the jump starter.
- 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.
- Once connected, the smart clamps will indicate readiness (e.g., a green light).
- Start your car engine.
- After the engine starts, immediately remove the smart clamps from the car battery, then disconnect the jumper cable from the jump starter.
6.2 Using the Air Compressor (Tire Inflator)
- Locate the air hose stored on the back of the jump starter.
- Screw the air hose connector onto the valve stem of the tire or inflatable item.
- Turn on the jump starter. The screen will display the current pressure.
- Press the 'M' button to cycle through different inflation modes (e.g., car, motorcycle, bicycle, ball) and select the appropriate one.
- Use the '+' and '-' buttons to set your desired target pressure.
- Press the 'OK' button to begin inflation. The compressor will automatically stop once the preset pressure is reached.
- Disconnect the air hose and store it back in the device.

6.3 Using as a Portable Power Bank
The UTRAI Jstar 5 can charge various electronic devices:
- Connect your device's USB charging cable to the USB Output port (QC3.0, 5V-2.4A) on the jump starter.
- For devices requiring a Type-C connection, use the Type-C input port for charging the jump starter itself, or if the device supports Type-C output from the jump starter (check device compatibility).
- The DC Output (12V-16V-10A) can power 12V accessories using the appropriate adapter.

6.4 Using the LED Flashlight
The integrated LED light provides illumination and emergency signaling:
- Press the dedicated light button (often marked with a lightbulb icon) to turn on the light in Normal mode.
- Press the button again to cycle to Flashing mode.
- Press a third time for SOS mode.
- Press a fourth time to turn off the light.

7. Maintenance
- Cleaning: Wipe the device with a soft, dry cloth. Do not use harsh chemicals or abrasive cleaners.
- Storage: Store the UTRAI Jstar 5 in its protective carrying case in a cool, dry place, away from direct sunlight and moisture.
- Recharging: If the device is not used regularly, recharge it every 3-6 months to maintain battery health and prolong its lifespan.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device not turning on | Low battery charge | Recharge the device fully. |
| Vehicle not starting | Incorrect clamp connection; Severely discharged battery; Vehicle issue | Ensure clamps are connected correctly (Red to +, Black to -). Check if the smart clamps indicate readiness. If battery is extremely low, allow a few minutes for the jump starter to provide some charge before attempting to start. Consult a mechanic if the vehicle still doesn't start. |
| Air compressor not inflating | Hose not securely connected; Preset pressure is lower than current pressure; Overheating | Ensure the air hose is tightly screwed onto the valve. Set the target pressure higher than the current pressure. If the device is hot, allow it to cool down before resuming use. |
9. Specifications
| Feature | Specification |
|---|---|
| Peak Current | 3500 Amps |
| Battery Capacity | 27000 mAh |
| Air Compressor Pressure | 150 PSI (45 L/Min) |
| Start Voltage | 12 Volts |
| Engine Compatibility | Up to 8.0L Gas / 8.0L Diesel |
| USB Output | QC3.0, 5V-2.4A |
| Type-C Input | 5V-3A, 9V-2A |
| DC Output | 12V-16V-10A |
| Product Dimensions | 8.5 x 4.5 x 3 inches |
| Item Weight | 2 pounds |
10. Warranty and Support
For warranty information, technical support, or any inquiries regarding your UTRAI Jstar 5, please refer to the warranty card included in your package or visit the official UTRAI website. Contact details for customer service are typically provided on the manufacturer's website or in the product documentation.





