1. Introduction and Overview
The FNNEMGE Car Jump Starter is a powerful and versatile device designed to provide emergency jump-starting capabilities for vehicles, along with additional functions like a portable power bank and an LED flashlight. With a peak current of 4000A, it can start 12V vehicles with up to 8.0L gas or 6.5L diesel engines, even in extreme temperatures. Its intelligent safety mechanisms ensure safe and reliable operation.

Figure 1: FNNEMGE Car Jump Starter and accessories.
2. What's in the Box
Your FNNEMGE jump starter package includes the following items:
- 1 x Portable Jump Starter Unit
- 1 x Set of Smart Jumper Cables
- 1 x USB-C Charging Cable
- 1 x Dust Bag for storage
- 1 x User Manual (this document)
3. Safety Information
Please read and understand all safety information before using this product. Failure to follow these instructions may result in electric shock, fire, or serious injury.
3.1 Intelligent Protections
This jump starter battery pack is designed with 10 intelligent safety mechanisms to protect against common hazards:
- Spark-Proof Protection
- Zero Damage Protection
- Low Voltage Protection
- High Temperature Protection
- Short Circuit Protection
- Reverse Polarity Protection
- Over Voltage Protection
- Overcharge Protection
- Reverse Charge Protection
- Overcurrent Protection
Indicator lights and beeping sounds from the smart jumper clamps will alert you to any issues.

Figure 2: The jump starter features 10 intelligent safety protections.
3.2 General Safety Precautions
- Do not disassemble the unit.
- Do not expose the unit to extreme temperatures or direct sunlight.
- Keep out of reach of children.
- Ensure proper ventilation during use.
- Do not use if the unit or cables are damaged.
4. Setup and Initial Charging
Before first use, or if the battery level is low, fully charge the jump starter. The HD LCD screen will display the battery percentage.
4.1 Charging the Jump Starter
- Connect the provided USB-C charging cable to the 'Type-C In' port on the jump starter.
- Connect the other end of the USB-C cable to a suitable USB wall adapter (not included) or a powered USB port.
- The LCD screen will show the charging progress. Charge until it displays 100%.
It is recommended to fully charge the unit every 3-6 months to maintain battery health, especially if stored for long periods.
4.2 Understanding the HD LCD Display
The FNNEMGE car jump starter features an LCD screen that clearly displays all relevant information, including battery status, input/output indications, and alerts for high or low operating temperatures. This allows you to monitor the device's status at a glance.

Figure 3: The 2.6-inch intelligent LCD display provides comprehensive data.
5. Operating Instructions
5.1 Jump Starting a Vehicle
Ensure the jump starter is at least 50% charged before attempting to jump start a vehicle.
- Step 1: Insert the blue end of the smart jumper cables into the jump start port on the unit. Ensure a firm connection.
- Step 2: Connect the red clamp (+) to the positive terminal of the vehicle's battery and the black clamp (-) to the negative terminal. The smart clamps will indicate a correct connection.
- Step 3: Start your car engine. If it doesn't start on the first try, wait 30 seconds and try again. Do not attempt more than 3 consecutive starts.
- Step 4: Once the car starts, immediately remove the jumper cables from the jump starter, then disconnect the clamps from the car battery.

Figure 4: Quick guide to jump starting your car.
Video 1: Official demonstration of the FNNEMGE Car Jump Starter, including unboxing, connecting to a car battery, and starting a vehicle.
5.2 Using as a Portable Power Bank
The jump starter features 2 USB output ports and a Type-C input/output port, allowing it to function as a portable power bank for various electronic devices.
- Open the protective cover on the side of the unit to reveal the USB ports.
- Connect your device's charging cable to one of the USB output ports (USB1 or USB2) or the Type-C port.
- The jump starter will automatically begin charging your device.
It can charge cell phones, tablets, game consoles, drones, smartwatches, and more.

Figure 5: The jump starter functions as a portable power bank for various devices.
5.3 Using the LED Flashlight
The built-in 400-lumen LED light offers three modes for different situations:
- To turn on: Press and hold the power button for 3 seconds. The light will turn on in constant illumination mode.
- To change modes: Press the power button again to cycle through Strobe Light and SOS Light modes.
- To turn off: Press the power button until the light turns off, or press and hold for 3 seconds.
The flashlight is ideal for dark conditions, emergencies, camping, and outdoor activities.

Figure 6: The versatile 400-lumen LED flashlight with multiple modes.
6. Maintenance
Proper maintenance ensures the longevity and optimal performance of your FNNEMGE Car Jump Starter.
- Storage: Store the unit in a cool, dry place away from direct sunlight and extreme temperatures. Use the provided dust bag for protection.
- Charging: Recharge the unit every 3-6 months, even if not used, to maintain battery health and readiness.
- Cleaning: Wipe the unit with a soft, dry cloth. Do not use harsh chemicals or abrasive materials.
7. Troubleshooting
If you encounter issues with your jump starter, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit does not turn on | Battery is completely drained. | Charge the unit fully using the USB-C cable. |
| Vehicle does not start | Incorrect cable connection. | Check that clamps are securely connected to correct battery terminals. Refer to smart clamp indicators. |
| Vehicle does not start | Jump starter battery is too low. | Ensure the jump starter is at least 50% charged. Recharge if necessary. |
| Smart clamps show error/beep | Reverse polarity, short circuit, or other protection triggered. | Disconnect clamps, check connections, and reconnect carefully. Consult manual for specific error codes if available. |
| Device not charging from USB ports | Cable issue or device incompatibility. | Try a different USB cable or device. Ensure the jump starter is powered on. |
If problems persist, please contact customer support as detailed in the Warranty and Support section.
8. Specifications
| Feature | Detail |
|---|---|
| Brand | FNNEMGE |
| Model | FG301 |
| Peak Output Current | 4000 Amps |
| Vehicle Compatibility | 12V (up to 8.0L Gas & 6.5L Diesel engines) |
| Battery Type | Lithium Polymer (1 included) |
| USB Output | 2 x USB ports (5V/3A) |
| Type-C Input/Output | Yes |
| LED Flashlight | 400 Lumen (Flashlight, Strobe, SOS modes) |
| Display | HD LCD Screen (2.6 inches) |
| Item Weight | 0.75 Kilograms (1.65 pounds) |
| Package Dimensions | 10.39 x 8.74 x 2.24 inches |
9. Warranty and Support
FNNEMGE offers a 2-YEAR FREE WARRANTY for this product, along with Lifetime Technical Support and 24/7 Customer Service.
If you have any questions or require assistance during use, please reach out to us via the email address provided in the user manual included in your product packaging. Our dedicated support team is ready to help.

