1. Introduction
Thank you for choosing the UTRAI Jstar X1 Super Capacitor Car Jump Starter. This device is designed to provide a safe, reliable, and quick solution for jump-starting 12V vehicles with dead batteries. Utilizing advanced super capacitor technology, it offers a battery-free design, eliminating concerns about heat, explosion, and regular maintenance associated with traditional lithium-ion jump starters. Please read this manual thoroughly before using the product to ensure safe and optimal performance.
2. Product Overview
2.1 What's in the Box
The package includes the following items:
- UTRAI Jstar X1 Super Capacitor Jump Starter
- Smart Battery Clamps (Red for positive, Black for negative)
- USB-C Charging Cable
- Carrying Case
- User Manual
2.2 Device Layout
Familiarize yourself with the different parts of your Jstar X1 jump starter:
- USB-C Input Port
- LED Screen
- DC Input Port
- Power Button
- Black Battery Clamp
- Red Battery Clamp
- EC5 Port
- Battery Clamp Plug
3. Specifications
| Feature | Specification |
|---|---|
| Brand Name | UTRAI |
| Model | Jstar X1 |
| Capacity | 500 Farad (Super Capacitor) |
| Voltage | 14.8V |
| Jump Start Output | 12V |
| Peak Current | 1000A |
| USB-C Input | 5V / 2A (Approx. 30 mins for full charge) |
| DC Input | 12V / 5A (Approx. 5 mins for full charge) |
| EC5 Input (from car battery) | 12V / 8A (Approx. 3 mins for full charge) |
| Operating Temperature | -40°C to 70°C (-40°F to 158°F) |
| Dimensions (L x W x H) | 253mm × 110mm × 49mm |
| Weight | 950g |
| Applicable Vehicle Types | Passenger Car, Motorcycle, SUV, RV, Pickup, Snowmobile, Lawn Mower |
| Engine Compatibility | Up to 8.0L Gas, Up to 7.5L Diesel |
| Lifespan | Over 10 years (more than 100,000 uses) |
4. Safety Information
The Jstar X1 utilizes super capacitor technology, which inherently offers superior safety compared to traditional lithium-ion battery jump starters. Please observe the following safety guidelines:
- Battery-Free Design: The super capacitor design means there is no internal lithium battery, significantly reducing the risk of fire, bulging, or explosion under high temperatures, dropping, or shaking conditions.
- No Sparks: The smart clamp system incorporates multiple protection technologies to prevent sparks during connection, ensuring user safety.
- Operating Temperature: The device is designed to operate safely in extreme temperatures ranging from -40°C to 70°C (-40°F to 158°F).
- Smart Protections: Equipped with advanced multi-protection technologies to safeguard both the vehicle and the user.
- Always ensure correct polarity when connecting the clamps to the vehicle battery (Red to positive, Black to negative).
- Do not attempt to jump-start vehicles with voltage systems other than 12V.
- Keep the device away from children.
5. Setup
The Jstar X1 is designed for quick and easy setup. Before use, ensure the device is readily accessible and the vehicle's battery terminals are clean and free of corrosion.
- Remove the Jstar X1 from its carrying case.
- Ensure the smart battery clamps are securely connected to the EC5 port on the jump starter.
- Visually inspect the clamps and cables for any damage. Do not use if damaged.
6. Operating Instructions
6.1 Jump Starting Your Vehicle
The Jstar X1 allows you to quickly jump-start your car in just 3 minutes, without the need for prior charging.
Follow these three simple steps:
-
Plug & Connect: Connect the smart battery clamp plug to the EC5 port on the Jstar X1. Then, connect the Red (+) clamp to the positive terminal of your car battery and the Black (-) clamp to the negative terminal.
-
Charge: Wait for the Jstar X1 to charge from your car's weak battery. The LED screen will display the charging progress. Wait until the "---" symbol is displayed, indicating it's ready.
-
Start: Press the power button on the Jstar X1. Wait for a long beep after approximately 10 regular beeps. Once you hear the long beep, start your car's engine.
The Jstar X1 is capable of starting a wide range of 12V vehicles, including cars, SUVs, RVs, pickups, motorcycles, snowmobiles, and even lawn mowers, supporting up to 8.0L gas and 7.5L diesel engines.
6.2 Charging the Jump Starter
If your car battery is completely dead and cannot provide enough power to charge the Jstar X1, you can charge it from other sources:
- From another car battery (EC5 Port): Connect the clamps to another car battery. This method can fully charge the Jstar X1 in approximately 3 minutes.
- From a Power Bank (USB-C Port): Use the provided USB-C cable to connect the Jstar X1 to a power bank. This takes approximately 30 minutes for a full charge.
- From a Home Outlet (USB-C Port): Use a compatible USB wall adapter (not included) and the USB-C cable to charge from a home outlet. This also takes approximately 30 minutes for a full charge.
7. Maintenance
One of the key advantages of the Jstar X1's super capacitor technology is its minimal maintenance requirements. Unlike lithium-ion batteries, super capacitors do not require regular charging and discharging to maintain performance.
- Simply store the device in your car (trunk, glove box, or door storage compartment) and it will be ready when needed.
- Keep the device clean and dry.
- Avoid exposing the device to extreme physical shock or impact.
8. Troubleshooting
- Device not charging/turning on:
- Ensure all connections are secure and correct.
- Check if the vehicle battery has at least a minimal charge for the Jstar X1 to draw power from. If completely dead, use an alternative charging method (power bank or home outlet).
- Verify the charging cable and adapter are functional.
- Vehicle not starting after jump-start attempt:
- Ensure the clamps are firmly attached to the correct battery terminals (Red to +, Black to -).
- Wait for the Jstar X1 to fully charge and display the "---" symbol before attempting to start.
- If the vehicle still doesn't start, there might be other issues with the vehicle's battery or starting system that require professional inspection.
- Device shows 0% charge quickly after use:
- This is normal behavior for a super capacitor jump starter. The Jstar X1 is designed to quickly discharge its stored energy to jump-start a vehicle. It does not hold a charge for extended periods like a traditional battery. It recharges rapidly from a weak car battery or other power sources when needed.
9. User Tips
- Understand Super Capacitor Behavior: The Jstar X1 uses super capacitors, which charge extremely fast but also discharge quickly when not connected to a power source. This is by design and ensures it's always ready to draw power from a weak battery for a quick jump-start. Do not expect it to hold a charge for days like a power bank.
- Keep it Handy: Since it doesn't require constant charging, store it in an easily accessible location in your vehicle, such as the glove box or trunk, so it's ready for emergencies.
- Extreme Weather Performance: The Jstar X1 is highly effective in extreme temperatures (-40°C to 70°C), making it a reliable choice for all seasons.
10. Warranty and Support
The UTRAI Jstar X1 Super Capacitor Car Jump Starter comes with a 24-month warranty from the date of purchase. This warranty covers manufacturing defects and malfunctions under normal use.
For technical support, warranty claims, or any questions regarding your product, please contact the seller or manufacturer directly. Keep your purchase receipt as proof of purchase for warranty services.





