1. Introduction
The UTRAI Jstar 5 is a versatile multi-function device designed for automotive emergencies and outdoor activities. It combines a powerful jump starter, an electric air compressor, a mobile power bank, and an emergency LED light. This manual provides essential information for safe and effective operation, maintenance, and troubleshooting.
2. Safety Information
Please read and understand all safety warnings and instructions before using this product. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Always connect the smart clamps correctly to the vehicle battery terminals (red to positive, black to negative).
- Do not touch the red and black clamps together to avoid short circuits.
- Once the engine starts, disconnect the battery clamps from the car battery and the jump starter within 30 seconds.
- Avoid using the device in extreme cold or humid conditions (-20℃ to 60℃ is the operating range). Performance may be reduced outside this range.
- Do not use the device if the vehicle battery is severely degraded or damaged.
- If the vehicle battery is completely discharged, use the boost mode as described in the operating instructions.
- For long-term storage, recharge the device every 3 months to prolong battery life.
- Keep the device away from children.
- Ensure proper ventilation when using the air compressor; it can generate heat.
3. Package Contents
Verify that all items are present in your package:
- UTRAI Jstar 5 Jump Starter and Air Compressor Unit
- Smart Battery Clamps
- USB-C Charging Cable
- DC Car Charger Adapter
- Air Nozzle Adapters (3 pieces)
- User Manual
- Storage Case

4. Product Features
The UTRAI Jstar 5 offers multiple functionalities:
- Jump Starter: 5000A peak current, capable of starting all gasoline vehicles and diesel vehicles up to 8L.
- Air Compressor: Built-in electric air compressor with a maximum pressure of 150 PSI, suitable for tires, balls, and inflatables. Features automatic stop when preset pressure is reached.
- Mobile Power Bank: 27000mAh capacity with USB (5V/2.4A) and QC3.0 fast charging output ports for charging smartphones, tablets, and other electronic devices. Includes a DC output port (12V-16V/10A) for car accessories.
- LED Emergency Light: Equipped with a bright LED light offering illumination, warning (strobe), and SOS modes for various emergency situations.
- Safety Protections: Features 9 types of protection including short circuit, reverse connection, over-discharge, over-current, reverse current, low voltage, high voltage, temperature, and overcharge protection. PSE certified.
- Digital LCD Display: Clear display for battery level, tire pressure, and output status.

5. Setup
Before first use, fully charge the UTRAI Jstar 5 unit. Connect the provided USB-C charging cable to the device and a suitable power source. The LCD display will indicate the charging status.
6. Operating Instructions
6.1. Jump Starting a Vehicle
- Ensure the jump starter is sufficiently charged.
- Insert the smart battery clamp plug completely into the jump start port on the UTRAI Jstar 5. The red and green lights on the clamp will flash alternately.
- Connect the red clamp to the positive (+) terminal of the car battery and the black clamp to the negative (-) terminal.
- Once connected correctly, the green light on the smart clamp will illuminate steadily, and a click sound may be heard.
- Start your vehicle's engine within 60 seconds.
- After the engine starts, remove the battery clamps from the car battery and then from the jump starter within 30 seconds.

Video 6.1: Demonstration of the UTRAI Jstar 5 jump starting a car.
6.2. Using the Air Compressor
- Remove the air hose from its storage slot on the device.
- Press the 'OK' button to activate the display, then press the 'M' button to cycle through air inflation modes (car, motorcycle, bicycle, ball).
- Use the '+' and '-' buttons to set the desired air pressure. Refer to your vehicle's manual or tire sidewall for recommended pressure.
- Securely connect the air hose to the tire valve. The current tire pressure will be displayed on the LCD.
- Press the 'OK' button to start inflation. The compressor will automatically stop when the preset pressure is reached.
- Disconnect the air hose from the tire valve and store it back in the unit.

6.3. Using as a Mobile Power Bank
The UTRAI Jstar 5 can charge various electronic devices:
- Connect your device's USB charging cable to one of the USB output ports (5V/2.4A or QC3.0) on the Jstar 5.
- For 12V car accessories, connect the DC car charger adapter to the DC output port (12V-16V/10A) and then to your accessory (e.g., car vacuum, car refrigerator).

6.4. Using the LED Light
The integrated LED light has multiple modes for different situations:
- Press the light button (usually indicated by a light bulb icon) on the control panel to cycle through modes: Illumination, Strobe (warning), and SOS.
- The bright light is useful for working in dark engine bays or as a camping light.
- Strobe and SOS modes are for emergency signaling.

7. Maintenance
- Charging: To maintain optimal battery health, fully charge the Jstar 5 every three months, especially during long periods of inactivity.
- Cleaning: Wipe the device with a dry, soft cloth. Do not use harsh chemicals or abrasive materials.
- Storage: Store the device in a cool, dry place, away from direct sunlight and extreme temperatures. Use the provided storage case for protection.
8. Troubleshooting
If you encounter issues with your UTRAI Jstar 5, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Vehicle does not start | Low charge on jump starter, incorrect clamp connection, severely discharged vehicle battery. | Ensure jump starter is fully charged. Recheck clamp connections (red to +, black to -). If vehicle battery is completely flat, use boost mode (refer to full manual for specific instructions). |
| Smart clamp indicator light is red or flashing red/green rapidly | Short circuit, reverse polarity, over-temperature, or other safety protection activated. | Immediately disconnect clamps. Check for correct polarity. Allow device to cool down if it was recently used. Ensure clamps are not touching each other. |
| Air compressor not inflating | Air hose not securely connected, incorrect pressure setting, device not powered on. | Ensure air hose is tightly screwed onto the tire valve. Verify the device is powered on and the desired pressure is set. Check battery level. |
| Device not charging | Faulty charging cable/adapter, power source issue. | Try a different USB-C cable and power adapter. Ensure the power source is active. |
9. Specifications
| Feature | Specification |
|---|---|
| Model Number | JS 5 |
| Peak Current | 5000 Amperes |
| Battery Capacity | 27000mAh |
| Battery Type | Lithium Polymer |
| Voltage | 12 Volts |
| Air Compressor Max Pressure | 150 PSI (1035 kPa) |
| Compatible Vehicle Types | All gasoline engine vehicles, diesel engine vehicles up to 8L |
| Product Dimensions | 20 x 16 x 8 cm |
| Product Weight | 2 Kilograms |
| Operating Temperature | -20℃ to 60℃ |
10. Warranty and Support
The UTRAI Jstar 5 comes with a 12-month warranty. If you encounter any issues with the product or have questions, please contact UTRAI customer support directly for assistance. Provide your purchase details and a description of the problem for prompt service.





