1. Introduction
The UTRAI JS-8 is a powerful and versatile car jump starter and power bank designed to provide emergency starting power for vehicles and charge electronic devices. With a peak current of 6000A and a 20000mAh (74Wh) battery capacity, it can start a wide range of 12V vehicles, including gasoline engines up to 10.0L and diesel engines up to 8.0L. It also features multiple USB outputs for charging, a 10W wireless charging function, and a 3-mode LED flashlight for various situations.
Figure 1: UTRAI JS-8 Jump Starter with Smart Clamps
2. Package Contents
Please check the package for the following items:
- UTRAI JS-8 Jump Starter
- Smart Clamps (Red and Black)
- USB-C Charging Cable
- User Manual
- Storage Bag
Figure 2: Included items in the UTRAI JS-8 package
3. Product Layout
Figure 3: UTRAI JS-8 Layout and Dimensions
The UTRAI JS-8 features a clear display screen and various ports for functionality:
- Display Screen: Shows battery percentage, charge/recharge status, and temperature alarms.
- Power Button: Used to turn the device on/off and control the LED light.
- USB Output Port 1: For fast charging compatible devices.
- USB Output Port 2: Standard USB charging port.
- USB-C Input Port: For charging the jump starter itself.
- LED Light: Integrated flashlight with multiple modes.
- EC5 Output Port: For connecting the smart clamps for jump starting.
- Red Battery Clamp: Connects to the positive (+) terminal of the car battery.
- Black Battery Clamp: Connects to the negative (-) terminal of the car battery.
- LED Indicators (on Smart Clamp): Provide status feedback during jump starting.
- Battery Clamp Plug: Connects the smart clamps to the EC5 output port.
4. Setup
4.1 Initial Charging
Before first use, fully charge the UTRAI JS-8. Connect the provided USB-C charging cable to the USB-C Input Port on the jump starter and a suitable USB power adapter (not included). The display will show the charging status. A full charge typically takes 8-10 hours.
4.2 Checking Battery Level
Press the Power Button once to activate the display and check the remaining battery percentage. Ensure the device has sufficient charge before attempting to jump start a vehicle.
Figure 4: Informative Display showing battery percentage and status
5. Operating Instructions
5.1 Jump Starting a Vehicle
Follow these steps to safely jump start your vehicle:
- Connect Smart Clamps: Plug the smart clamp cable into the EC5 output port of the UTRAI JS-8. Ensure a secure connection.
- Connect to Car Battery:
- Attach the RED (+) clamp to the positive terminal of the car battery.
- Attach the BLACK (-) clamp to the negative terminal of the car battery.
The LED indicator on the smart clamp should turn GREEN, indicating a correct and safe connection.
- Start Vehicle: Once the smart clamp indicator is green, start your vehicle's engine.
- Remove Clamps: As soon as the vehicle starts, immediately remove the smart clamps from the car battery terminals, then disconnect the smart clamp cable from the UTRAI JS-8.
Figure 5: Three steps to jump start your vehicle
Video 1: Demonstration of jump starting a vehicle with UTRAI JS-8.
5.2 Charging Electronic Devices
The UTRAI JS-8 can charge various electronic devices:
- USB Output Ports: Connect your device's charging cable to either USB 1 (Fast Charge: 5V/3A, 9V/2A, 12V/1.5A) or USB 2 (Standard: 5V/2.1A) ports. For faster charging of a single device, use USB 1.
- Wireless Charging: Place your Qi-compatible device on the designated wireless charging area of the jump starter. The device supports 10W wireless charging.
Figure 6: Charging smart devices using the USB outputs
5.3 Using the LED Light
The built-in LED light has three modes for different occasions:
- Normal Light: Press the Power Button once to turn on the steady bright light.
- Strobe Light: Press the Power Button again to switch to strobe mode.
- SOS Signal: Press the Power Button a third time to activate the SOS flashing signal.
- Turn Off: Press the Power Button a fourth time to turn off the light.
Figure 7: UTRAI JS-8 with 3-mode LED flashlight
6. Maintenance
- Regular Charging: To protect the battery life, charge the UTRAI JS-8 every 3 months, even if not in use.
- Storage: Store the device in a cool, dry place, away from direct sunlight and extreme temperatures.
- Cleaning: Use a soft, dry cloth to clean the device. Do not use harsh chemicals or abrasive materials.
- Avoid Moisture: Keep the device away from water and high humidity.
Figure 8: Reminder to charge the device regularly for optimal battery life
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Vehicle does not start. | Low battery on jump starter, incorrect clamp connection, vehicle battery completely dead. | Ensure jump starter is fully charged. Check that clamps are securely connected to the correct battery terminals (Red to +, Black to -). If the smart clamp indicator is not green, re-adjust connections. |
| Smart clamp indicator is RED or flashing. | Reverse polarity, short circuit, over-temperature, low battery. | Disconnect clamps immediately. Check for correct polarity (Red to +, Black to -). Ensure clamps are not touching each other or other metal parts. Allow device to cool down if it's hot. Charge the jump starter if battery is low. |
| Jump starter does not turn on. | Battery is completely discharged. | Charge the jump starter using the USB-C input port. |
| Electronic devices are not charging. | Jump starter is off, cable is faulty, device is not compatible with wireless charging. | Turn on the jump starter. Try a different charging cable. Ensure your device supports Qi wireless charging for the wireless function. |
Safety Protections:
The UTRAI JS-8 is equipped with multiple safety features:
- NTC Protection: Prevents overcharge, overdischarge, overcurrent, and overheating.
- ABS Fireproof Shell: Made of PC+ABS UL94-V0 flame retardant material for enhanced safety.
- Short Circuit Protection: Automatically protects against short circuits.
- Reverse Polarity Protection: Prevents damage from incorrect clamp connections.
- Over-temperature Protection: Activates if the device temperature exceeds 65℃ ± 5℃.
Figure 9: All-round safety features including NTC protection, ABS shell, and smart clamps
Figure 10: Smart NTC Protection system for battery temperature monitoring
8. Specifications
| Feature | Specification |
|---|---|
| Model | JS-8 |
| Battery Capacity | 20000mAh (74Wh) |
| Peak Current | 6000A |
| Jump Start Output | 12V |
| Gas Engine Rating | Up to 10.0L |
| Diesel Engine Rating | Up to 8.0L |
| USB-C Input | 5V/2A, 9V/2A, 12V/1.5A |
| USB 1 Output | 5V/3A, 9V/2A, 12V/1.5A (Fast Charge) |
| USB 2 Output | 5V/2.1A |
| Wireless Charge | 10W |
| Charging Time | 8-10 hours |
| Unit Size (L*W*H) | 255mm x 93mm x 37mm |
| Item Weight | 815g |
| Operating Temperature | -20℃ to 60℃ |
| Battery Cycle Life | 100 times |
| Certifications | CE, FCC, RoHS, PSE |
Figure 11: Key specifications of the UTRAI JS-8
Figure 12: Engine compatibility for UTRAI JS-8
9. User Tips
- Always ensure the jump starter is adequately charged before heading out, especially for long trips or in cold weather.
- For optimal charging speed of a single electronic device, utilize the USB 1 (Fast Charge) port.
- Familiarize yourself with the smart clamp LED indicators to quickly diagnose connection issues during jump starting.
- Store the jump starter in its provided bag to protect it from dust and damage.
- The built-in LED light can be a lifesaver in dark conditions, offering normal, strobe, and SOS modes for visibility and emergencies.
10. Warranty and Support
The UTRAI JS-8 comes with a 1-Year Warranty from the date of purchase, covering manufacturing defects. For any technical assistance, troubleshooting, or warranty claims, please contact UTRAI Professional Customer Service through the retailer or the official UTRAI website.
Figure 13: UTRAI Premium Service and Warranty information