UTRAI JS mini
UTRAI Portable Car Jump Starter JS-Mini User Manual
Model: JS-Mini
Product Overview
The UTRAI JS-Mini Portable Car Jump Starter is a compact and powerful device designed to jump-start 12V vehicles with up to 7.5L gas and 5.5L diesel engines. It also functions as a portable power bank and features an LED flashlight with multiple modes.

Figure 1: UTRAI JS-Mini Portable Car Jump Starter with smart clamps.
Package Contents
Upon opening the package, verify that all components are present:
- UTRAI Portable Lithium Car Battery Jump Starter (JS-Mini) x1
- Smart Jump Cable x1
- USB Type-C Charging Cable x1
- User Manual x1

Figure 2: Included components in the UTRAI JS-Mini package.
Setup and Charging
Before first use, fully charge the UTRAI JS-Mini jump starter. It is recommended to charge the device every 2-3 months if not used for an extended period to maintain battery health.
- Connect the provided USB Type-C Charging Cable to the 'Input' port on the jump starter.
- Connect the other end of the USB Type-C cable to a suitable USB power adapter (not included).
- Allow the device to charge until the battery indicator lights show 100% charge. The indicator lights display charge levels at 25%, 50%, 75%, and 100%.

Figure 3: The jump starter can also function as a portable power bank for charging devices.
Operating Instructions: Jump Starting a Vehicle
The UTRAI JS-Mini is designed for safe and easy jump-starting of 12V vehicles. Ensure the jump starter is fully charged before use.
- Insert the Smart Jump Cable: Plug the blue end of the smart jump cable into the jump starter's designated port.
- Connect to Battery Terminals: Attach the red clamp to the positive (+) terminal of the vehicle's battery and the black clamp to the negative (-) terminal. Ensure a secure connection. The smart clamp features an LED display for status indication.
- Start the Vehicle: Return to your vehicle and start the engine.
- Remove Clamps: Once the vehicle starts, immediately remove the smart clamps from the car battery terminals, then disconnect the smart jump cable from the jump starter.

Figure 4: Step-by-step guide for jump-starting a vehicle.
Using the LED Flashlight
The jump starter includes a multi-mode LED flashlight for emergency and outdoor use.
- Flash Light Mode: Press the power button once to turn on the flashlight.
- Strobe Light Mode: Press the power button a second time to activate the strobe light.
- SOS Light Mode: Press the power button a third time for the SOS signal.
- Turn Off: Press the power button a fourth time to turn off the flashlight.

Figure 5: The integrated 3-mode LED flashlight.
Safety Features and Protections
The UTRAI JS-Mini is equipped with multiple safety protections to ensure safe operation:
- Spark-Proof: Prevents sparks during connection.
- Reverse Polarity Protection: Protects against incorrect battery connections.
- Low-Temperature Protection: Ensures safe operation in cold conditions.
- High-Temperature Protection: Prevents overheating.
- Over-Load Protection: Safeguards against excessive current draw.
- Short Circuit Protection: Prevents damage from short circuits.
- Overdischarge Protection: Protects the internal battery from deep discharge.
- Reverse Charge Protection: Prevents reverse current flow.
- Overcurrent Protection: Limits current to safe levels.
The device is constructed with ABS fire-proof material, a shock-proof structure, and a dust-proof design for enhanced durability and safety.

Figure 6: Built-in safety features and robust construction.
Maintenance
- Store the jump starter in a cool, dry place away from direct sunlight and extreme temperatures.
- Charge the device every 2-3 months to maintain optimal battery performance, especially if not used regularly.
- Keep the smart clamps clean and free of debris to ensure proper electrical contact.
- Do not attempt to disassemble or modify the jump starter. Refer to qualified personnel for repairs.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Jump starter does not turn on. | Battery is depleted. | Charge the jump starter fully using the provided USB Type-C cable. |
| Vehicle does not start after connecting. | Incorrect clamp connection; vehicle battery completely dead; jump starter not fully charged; vehicle issue unrelated to battery. | Ensure clamps are securely connected to the correct battery terminals (+ to +, - to -). Check jump starter charge level. If battery is completely dead, allow a few minutes for the jump starter to provide some charge before attempting to start. Consult a mechanic if the issue persists. |
| Smart clamp LED display shows an error. | Reverse polarity, short circuit, or other protection activated. | Disconnect clamps and re-connect carefully, ensuring correct polarity. Refer to the smart clamp's specific error codes if available. |
| LED flashlight modes not cycling. | Power button not pressed correctly or device malfunction. | Ensure firm presses on the power button. If issue persists, contact customer support. |
Specifications
| Feature | Detail |
|---|---|
| Model | JS-Mini |
| Peak Current | 1500A (Also listed as 1000 Amps in some specifications) |
| Battery Capacity | 13800mAh |
| Engine Compatibility | Up to 7.5L Gas and 5.5L Diesel Engines (12V vehicles) |
| USB Output 1 | 5V/3A (Quick Charge 3.0) |
| USB Output 2 | 5V/2.1A |
| Dimensions (L x W x H) | 5.91" x 3.35" x 1.02" (approx.) |
| Item Weight | 0.33 Kilograms (approx. 11.6 ounces) |
| Battery Type | Lithium Polymer |
| Operating Temperature | -20°C to 70°C |

Figure 7: The powerful capabilities of the UTRAI JS-Mini.
Warranty and Support
The UTRAI JS-Mini Portable Car Jump Starter comes with a 2-Year Warranty.
For any questions or assistance, please feel free to contact UTRAI customer support.
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