1. Introduction
Thank you for choosing the BuTure VAC 4000A Car Jump Starter. This powerful and versatile device is designed to provide reliable jump-starting for vehicles with up to 8.5L gas or 8.0L diesel engines. Beyond its primary function, it also serves as a portable power bank for your electronic devices and features a multi-mode LED flashlight for emergencies. Please read this manual thoroughly before use to ensure safe and optimal operation.
2. Safety Information
WARNING: Read and understand all safety information before using this product. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Do not operate the jump starter if the cables or clamps are damaged.
- Ensure proper polarity connection (red to positive, black to negative) to avoid sparks or damage.
- Do not jump start a frozen battery.
- Keep the jump starter away from children.
- Do not expose the device to rain or extreme temperatures.
- Always remove the jump starter from the vehicle battery within 30 seconds after the engine starts.
- Do not short-circuit the positive and negative clamps.
3. Package Contents
Verify that all items are present in your package:
- BuTure VAC 4000A Car Jump Starter (Model: Beta02)
- Heavy-Duty Jumper Cables with Smart Clamps
- USB-C Charging Cable
- Rugged Carrying Case
- User Manual

4. Product Overview
Familiarize yourself with the components of your BuTure VAC Jump Starter:
- Main Unit: Portable power pack with integrated battery.
- 5-inch LCD Display: Shows real-time power levels, status updates, and charging indicators.
- Power Button: Activates the device and controls flashlight modes.
- Jumper Cable Port: Dedicated port for connecting smart jumper cables.
- Dual USB Output Ports: For charging smartphones, tablets, and other USB-powered devices.
- USB-C Input Port: For recharging the jump starter unit.
- LED Flashlight: Features multiple modes (flashlight, SOS, flashing).

5. Setup
5.1 Charging the Jump Starter
Before first use, fully charge the jump starter. It is recommended to recharge the unit every 3-6 months to maintain battery health, even if not in use.
- Connect the provided USB-C charging cable to the USB-C input port on the jump starter.
- Connect the other end of the USB-C cable to a suitable USB wall adapter (not included) or a car charger.
- The LCD display will show the charging progress. The unit is fully charged when the display shows 100%.

6. Operating Instructions
6.1 Jump Starting a Vehicle
Ensure the jump starter is at least 50% charged before attempting to jump start a vehicle.
- Turn off your vehicle's ignition and all accessories (lights, radio, etc.).
- Insert the smart jumper cable plug fully into the jump starter's jumper cable port.
- Connect the red (+) clamp to the positive (+) terminal of the vehicle's battery.
- Connect the black (-) clamp to the negative (-) terminal of the vehicle's battery.
- The smart clamps' indicator light will turn solid green, indicating a safe connection. If it flashes red or beeps, check the connections for proper polarity.
- Start your vehicle's engine.
- Once the engine starts, immediately remove the black (-) clamp, then the red (+) clamp from the vehicle battery.
- Disconnect the smart jumper cable from the jump starter.


6.2 Using as a Power Bank
The jump starter features dual USB output ports to charge your portable electronic devices.
- Connect your device's USB charging cable to one of the USB output ports on the jump starter.
- The jump starter will automatically begin charging your device.
- The LCD display will show the remaining battery percentage of the jump starter.

6.3 Using the LED Flashlight
The integrated LED flashlight offers multiple lighting modes for various situations.
- Press and hold the Power Button for 3 seconds to turn on the flashlight (steady light mode).
- Press the Power Button again to cycle through the modes: Steady Light → SOS → Flashing → Off.
- To turn off the flashlight directly from any mode, press and hold the Power Button for 3 seconds.

7. Maintenance & Storage
- Store the jump starter in its rugged carrying case when not in use to protect it from dust and damage.
- Recharge the unit every 3-6 months to maintain optimal battery performance and extend its lifespan.
- Clean the device with a dry, soft cloth. Do not use harsh chemicals or abrasive materials.
- Keep the jump starter in a cool, dry place, away from direct sunlight and heat sources.

8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Vehicle does not start. | Low battery on jump starter. Incorrect clamp connection. Vehicle battery completely dead. | Ensure jump starter is sufficiently charged. Check clamp polarity (red to +, black to -). Try the 'Force Start' function if available (refer to smart clamp instructions). |
| Smart clamps indicator light is red/beeping. | Reverse polarity connection. Short circuit. | Disconnect clamps and re-connect with correct polarity. Ensure clamps are not touching each other. |
| Jump starter not charging. | Faulty charging cable or adapter. | Try a different USB-C cable and/or wall adapter. Ensure connections are secure. |
| USB devices not charging. | Jump starter battery low. Faulty USB cable. | Recharge the jump starter. Try a different USB cable. |
9. Specifications
- Model: Beta02
- Peak Current: 4000A
- Battery Capacity: 21800mAh
- Start Voltage: 12V
- Engine Compatibility: Up to 8.5L Gas / 8.0L Diesel
- USB Output: Dual USB ports (specifications may vary, refer to device for exact output)
- USB-C Input: For charging the unit
- LED Flashlight Modes: Steady, SOS, Flashing
- Operating Temperature: -20°C to 60°C (-4°F to 140°F)
- Dimensions: 18.4 x 8.6 x 3.5 cm
- Weight: 460 g
- Battery Cell Composition: Lithium Polymer
10. Warranty & Support
Your BuTure VAC Car Jump Starter is backed by a 2-year warranty for returns and lifetime technical support. For any questions, concerns, or technical assistance, please contact our customer support team through the retailer's platform or visit the official BuTure VAC store.
BuTure VAC Store: Visit the BuTure VAC Store on Amazon

