1. Product Overview
The Roadjoy Portable Car Jump Starter with Air Compressor is a versatile emergency tool designed to jump start vehicles, inflate tires, and serve as a power bank for electronic devices. It features a powerful 5000A peak current for jump starting and a 150psi air compressor for tire inflation.
Figure 1: Roadjoy Portable Car Jump Starter with Air Compressor
Figure 2: Product Package Contents and Applications (Jump starter unit, jump cables, inflation hose, various nozzles, carrying case)
2. Safety Information
- Read all instructions before using the device.
- Do not operate the device in explosive atmospheres, such as in the presence of flammable liquids, gases, or dust.
- Keep children away from the device.
- Do not expose the device to rain or wet conditions.
- Use only the provided jump cables and accessories.
- Ensure proper polarity when connecting to a vehicle battery (Red to Positive, Black to Negative).
- Avoid short-circuiting the jump starter clamps.
- Do not leave the jump starter connected to the vehicle battery for extended periods after starting.
- The device is designed to withstand extreme temperatures but avoid prolonged exposure to direct sunlight or excessive heat.
3. Getting Started: Initial Setup and Charging
Before first use, fully charge the Roadjoy Portable Car Jump Starter.
- Connect the provided USB-C charging cable to the device's input port.
- Connect the other end of the USB-C cable to a suitable USB wall adapter (not included) or a car charger.
- The digital display will indicate the charging status. Charge until the battery indicator shows full.
It is recommended to recharge the device every 3-6 months to maintain optimal battery health, even if not in use.
Figure 3: The device can be charged via USB-C (Input 65W) and also functions as a power bank (Output 65W USB-C, 10W USB-A).
4. Operating Instructions
4.1. Jump Starting a Vehicle
This device is suitable for 8.0L Gasoline and 7.0L Diesel engines.
- Ensure the jump starter is sufficiently charged (at least 50% recommended).
- Turn off your vehicle's ignition and all accessories.
- Connect the red clamp of the jump cables to the positive (+) terminal of your vehicle's battery.
- Connect the black clamp of the jump cables to the negative (-) terminal of your vehicle's battery.
- Plug the jump cable connector into the jump starter's output port.
- If your vehicle's battery is completely dead, you may need to press the 'BOOST' button on the jump starter to force a jump start. Refer to Figure 4.
- Start your vehicle.
- Once the vehicle starts, immediately disconnect the jump cable connector from the jump starter.
- Then, disconnect the black clamp from the vehicle battery, followed by the red clamp.
Figure 4: Location of the Boost Button for force jump starting.
Figure 5: Proper connection of jump cables to a vehicle battery.
4.2. Tire Inflation
The built-in air compressor can inflate tires up to 150psi.
- Power on the air pump function on the device.
- Connect the inflation hose to the tire valve. Ensure a secure connection to prevent air leakage.
- Choose the correct pressure unit (PSI, BAR, KPA, kg/cm²) using the 'MODE' button and preset the desired pressure using the '+' and '-' buttons.
- Start the tire pump to inflate. The device will display the current pressure.
- Wait until the air pump automatically stops once the preset pressure is reached.
- Then, pull out the hose from the tire valve.
Figure 6: Step-by-step guide for tire inflation.
4.3. Using as a Power Bank
The device can charge various electronic devices via its USB-C (65W output) and USB-A (10W output) ports.
- Connect your device's charging cable to the appropriate USB-C or USB-A output port on the jump starter.
- The jump starter will automatically begin charging your device.
4.4. Using the LED Flashlight
The built-in 200-lumen LED flashlight offers multiple modes for emergency situations.
- Press and hold the flashlight button to turn on the steady light.
- Press the button again to cycle through modes: Steady Light > SOS > Strobe > Off.
Figure 7: The 200-lumen LED flashlight with SOS and Strobe lighting modes.
5. Maintenance
- Charging: Recharge the jump starter fully after each use. If not used frequently, charge it every 3-6 months to prevent deep discharge and prolong battery life.
- Cleaning: Wipe the device with a dry, soft cloth. Do not use harsh chemicals or abrasive cleaners.
- Storage: Store the device in a cool, dry place away from direct sunlight and extreme temperatures. The device is designed to operate and be stored in a wide temperature range without exploding.
- Cable Care: Inspect jump cables and inflation hose for any damage before each use. Replace if frayed or damaged.
Figure 8: The device is built with high-temperature resistance for safe use and storage.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Vehicle does not start after jump attempt. |
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| Air compressor not inflating. |
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| Device not charging external devices. |
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7. Specifications
| Feature | Specification |
|---|---|
| Brand Name | ROADJOY |
| Peak Current | 5000A (for jump starting) |
| Air Compressor Pressure | 150psi |
| Engine Compatibility | Up to 8.0L Gasoline / 7.0L Diesel |
| Battery Capacity | 18000-20000 mAh |
| Conversion Rate | >90% |
| Number of Built-in Batteries | >6 |
| External Testing Certification | FCC, CE |
| Flashlight Output | 200-lumen LED with SOS and Strobe |
| USB-C Output/Input | 65W |
| USB-A Output | 10W |
| Origin | Mainland China |
Figure 9: Visual representation of product dimensions and key features.
8. User Tips
- Always check the jump starter's battery level before heading out on a long trip.
- For optimal performance, ensure the jump starter is fully charged before attempting to jump start a vehicle.
- When inflating tires, always check your vehicle's recommended tire pressure (usually found on a sticker inside the driver's side door jamb or in the owner's manual).
- Keep the device and its accessories in the provided carrying case to protect them from damage and ensure all components are together when needed.
- In cold weather, battery performance can be reduced. Keep the jump starter in a warmer environment (e.g., inside the car cabin) if possible, before use.
9. Warranty and Support
This product comes with a standard manufacturer's warranty. For detailed warranty information, technical support, or service inquiries, please refer to the official Roadjoy website or contact the seller directly.
Please retain your proof of purchase for warranty claims.





