Introduction
The Scosche PBJF400 is a versatile portable power device designed to jump-start vehicles, charge electronic devices, and provide illumination. This manual provides essential information for the safe and effective use of your jump starter.
Package Contents
Ensure all items are present before initial use:
- Portable LED Flashlight with Car Jumper Cables
- Micro-USB Cable
- 12V Car Power Adapter
- Protective Carrying Case
- User Manual

Figure 1: All components included with the Scosche PBJF400 Portable Car Battery Jump Starter.
Key Features
- Powerful Automotive Jump Starter: 400 amps of power for vehicles with 4-cylinder engines up to 2.0 liters or 6-cylinder engines up to 3.5 liters.
- Versatile Safety Precautions: Spark-free safety system with 10 protections including polarity, overheating, overcharge, over voltage, and short circuit.
- USB Charging Port: A 5-Volt (2 amp) USB port for charging smartphones, tablets, cameras, and other USB-powered devices.
- Battery Level Indicator: 5 LED lights on the flashlight indicate the remaining battery charge.
- Ultra-Bright LED Flashlight: Multi-mode 1,000 lumen LED flashlight with SOS mode for emergencies.
- Durable Compact Design: Measures 10” L x 2 ¼” diameter, designed for easy storage and long-lasting use.
Setup and Charging
Charging the PBJF400 Unit
The PBJF400 comes pre-charged and ready for immediate use. To recharge the unit:
- Connect the micro-USB cable to the input port on the PBJF400.
- Plug the other end of the micro-USB cable into the 12V car power adapter or a standard USB wall adapter (not included).
- The LED battery level indicators will illuminate to show charging progress. The unit is fully charged when all 5 LEDs are solid.

Figure 2: The PBJF400 features a USB charging port for electronic devices.
Operating Instructions: Jump Starting a Vehicle
Follow these steps carefully to jump-start your vehicle:
- Ensure the PBJF400 unit has sufficient charge (check battery level indicators).
- Connect the jumper cables to the PBJF400 unit.
- Attach the red (+) clamp to the positive terminal of the vehicle battery.
- Attach the black (-) clamp to the negative terminal of the vehicle battery.
- Start your vehicle.
- Once the vehicle starts, immediately remove the black (-) clamp, then the red (+) clamp from the battery.
- Disconnect the jumper cables from the PBJF400 unit.

Figure 3: Safe jump-starting in 3 easy steps.

Figure 4: The spark-free design ensures safe operation.
Official Product Video: Jump Starter Demonstration
Video 1: A demonstration of the Scosche Portable Car Jump Starter and Battery Booster in use.
Operating Instructions: LED Flashlight
The PBJF400 features a powerful 1,000 lumen LED flashlight with multiple modes:
- To turn on the flashlight, press and hold the power button on the unit.
- Press the power button repeatedly to cycle through different modes: high, medium, low, and SOS (blinking).
- To turn off the flashlight, press and hold the power button again.

Figure 5: The 1000 Lumen LED light provides ample illumination.
Operating Instructions: Portable Power Bank
Use the PBJF400 to charge your electronic devices:
- Connect your device's USB charging cable to the 5-Volt (2 amp) USB output port on the PBJF400.
- The PBJF400 will automatically begin charging your device.
- Monitor the battery level indicators on the PBJF400 to ensure sufficient charge for your devices.

Figure 6: The USB charging port allows you to power your electronic devices.
Maintenance
Charging and Storage
- Recharge the PBJF400 after each use, especially after jump-starting a vehicle, to ensure it's ready for the next emergency.
- Store the unit in its protective carrying case in a cool, dry place, away from direct sunlight and extreme temperatures.
- For long-term storage, it is recommended to charge the unit every 3-6 months to maintain battery health.
Troubleshooting
Common Issues and Solutions
- Unit not turning on: Ensure the unit is charged. If fully charged and still not responding, contact customer support.
- Vehicle not starting after jump: Double-check clamp connections to battery terminals. Ensure terminals are clean and free of corrosion. If the vehicle battery is completely dead (low voltage), you may need to use the 'Boost' function (refer to user manual for specific instructions on activating boost mode).
- LEDs not working: Check battery level. If the unit is fully charged and the flashlight is still not working, contact customer support.
- Device not charging from USB port: Ensure the PBJF400 has sufficient charge. Verify the USB cable is properly connected to both the PBJF400 and your device.
Specifications
- Brand: Scosche
- Model: PBJF400
- Peak Output Current: 400 Amps
- Battery Cell Composition: Lithium Ion
- Voltage: 5 Volts
- Item Weight: 2.5 Pounds
- Product Dimensions: 2.93 x 3.93 x 12.97 inches
- Flashlight: 1000 Lumen LED
- Safety Features: 10 safety protections (polarity, overheating, overcharge, over voltage, short circuit, etc.)
- Vehicle Service Type: Motorcycle, Passenger Car, Truck, Van (up to 3.5L Gasoline/2.0L Diesel Engines)
Warranty and Support
The Scosche PBJF400 Portable Car Battery Jump Starter is backed by Scosche’s Lifetime Tech Support and a 1 Year Warranty. For technical assistance or warranty claims, please refer to the contact information provided in your product packaging or visit the official Scosche website.