1. Product Overview
The GOOLOO GT4000S is a powerful and versatile jump starter power bank designed to provide emergency starting power for vehicles and charge various electronic devices. It features a high peak current, intelligent safety clamps, and a user-friendly display.
Image: GOOLOO GT4000S Jump Starter Power Bank with smart clamps attached.
- Quick Start Capability: Ready to jump start a vehicle after 5 minutes of charging. A full charge supports up to 60 jump starts.
- Powerful Performance: 4000A peak current, capable of starting all gasoline engines and diesel engines up to 10.0L.
- Large LCD Screen: A 3.2-inch display shows real-time battery status and operational readiness.
- Multi-functional Device: Functions as a jump starter, power bank for portable devices, and features an integrated LED flashlight.
- Extended Standby: Maintains charge for up to 24 months, thanks to 10 patented safety protections (Supersafe Technology).
- Durable Design: IP65 waterproof rating for protection against rain and dust.
2. 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.
- Vehicle Compatibility: Use only for 12V vehicles. Do not attempt to jump start vehicles with different voltage systems.
- Personal Safety: Wear eye protection and gloves when operating the jump starter. Do not touch the positive and negative clamps together.
- Ventilation: Ensure adequate ventilation when jump starting a vehicle. Batteries can produce explosive gases.
- Children and Pets: Keep the device out of reach of children and pets.
- Storage: Store the jump starter in a cool, dry place away from direct sunlight, heat sources, and flammable materials.
- Damage: Do not use the device if it is damaged, cracked, or has exposed wires. Contact support for assistance.
- Charging: Use only the provided charging cables and compatible chargers. Do not overcharge or leave unattended while charging.
Image: Diagram illustrating the 10 integrated safety protections, including AI software monitoring, reverse-polarity, over-charge, over-voltage, spark-proof, short-circuit, high and low-temp, over-current, over-load, and reverse-charge protection.
3. Package Contents
Verify that all items are present in your package:
- GOOLOO GT4000S Jump Starter Power Bank
- Smart Jumper Cables with Clamps
- USB-C to USB-C Cable
- USB-A to USB-C Cable
- 12V DC Car Charger
- Storage Bag
- User Manual
Image: The GOOLOO GT4000S jump starter, smart jumper cables, USB-C cables, 12V car charger, storage bag, and user manual.
4. Product Features and Ports
Familiarize yourself with the device's components and connection points.
Image: Labeled diagram showing the BOOST button, 12V Jump Starter Port, 15V/10A DC Port, 5V/2.4A Output Port, 5V/9V/12V Output Port, USB-C 100W Input & Output, and Power Switch.
Image: Close-up of the 3.2-inch LED screen displaying indicators for Battery Level, Low Current Mode, Reverse Battery Clamps, Low Temperature Reminder, Ready to Start, and Charging Power.
5. Charging the Jump Starter
Before initial use, fully charge the GOOLOO GT4000S. It supports 100W two-way fast charging.
- Connect the provided USB-C cable to the USB-C Input/Output port on the jump starter.
- Connect the other end of the USB-C cable to a compatible 100W USB-C wall charger (not included) or the 12V car charger.
- The LCD screen will display the charging status. A full charge typically takes 1.2 hours with a 100W charger.
- For quick jump-starting, a 5-minute charge can provide enough power to start a vehicle.
Image: The GOOLOO GT4000S jump starter connected to a car's 12V outlet for 100W two-way fast charging.
6. Operating Instructions
6.1. Jump Starting a Vehicle
Follow these two simple steps to jump start your 12V vehicle:
- Connect: Insert the smart jumper cable plug into the 12V Jump Starter Port on the GOOLOO GT4000S. Connect the red positive (+) clamp to the positive (+) terminal of the vehicle's battery and the black negative (-) clamp to the negative (-) terminal of the vehicle's battery. Ensure a secure connection. The LCD screen should display "READY" if connected correctly.
- Start: Once "READY" is displayed, start your vehicle's engine. If the vehicle does not start immediately, wait 30 seconds and try again. Do not attempt more than 3 consecutive jump starts.
- Disconnect: After the vehicle starts, immediately remove the clamps from the vehicle battery terminals, then disconnect the smart jumper cable from the jump starter.
Image: The GOOLOO GT4000S jump starter connected to a car battery, ready to start a 12V vehicle in seconds.
Image: A visual representation of the two simple steps: 1. Connect the clamps, 2. Press the start engine button.
6.2. Using as a Power Bank
The GOOLOO GT4000S can charge various electronic devices:
- USB-C 100W Input & Output: Use this port with a USB-C to USB-C cable to charge laptops, tablets, and smartphones that support USB Power Delivery (PD) up to 100W.
- USB-A 5V/2.4A Output: For standard USB charging of smartphones, tablets, and other small electronics.
- USB-A 5V/9V/12V Output: For Quick Charge compatible devices.
- 15V/10A DC Output: Can power 12V DC devices such as tire inflators or car vacuums (requires a compatible DC adapter, not included).
Image: The GOOLOO GT4000S charging a laptop and a smartphone simultaneously, demonstrating its power bank functionality.
6.3. Using the LED Flashlight
The integrated LED flashlight offers three modes:
- Normal: Provides continuous illumination.
- SOS: Emits the international Morse code signal for distress (three short, three long, three short flashes).
- Strobe: Produces rapid flashes for signaling or attracting attention.
To activate the flashlight, press and hold the power button. Press again to cycle through the modes. Press and hold to turn off.
Image: The GOOLOO GT4000S jump starter with its LED flashlight illuminated, demonstrating its utility in outdoor or emergency situations.
7. Maintenance and Storage
Proper maintenance ensures the longevity and performance of your GOOLOO GT4000S.
- Recharging: While the device boasts a 24-month standby time, it is recommended to check the battery level periodically and recharge it if it drops below 50%.
- Cleaning: Wipe the device with a dry, soft cloth. Do not use harsh chemicals or abrasive materials.
- Storage: Store the jump starter in its protective bag in a cool, dry place between 0°C and 45°C (32°F and 113°F). Avoid extreme temperatures and direct sunlight.
- Water Resistance: The IP65 rating provides protection against splashes and dust, but do not submerge the device in water.
Image: The GOOLOO GT4000S jump starter highlighting its 24-month standby capability, indicating long-term charge retention.
Image: The GOOLOO GT4000S jump starter with water droplets, illustrating its IP65 waterproof and dustproof rating.
8. Troubleshooting
If you encounter issues with your GOOLOO GT4000S, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not turn on. | Battery is completely discharged. | Charge the device using the provided USB-C cable and a compatible charger. |
| "READY" not displayed on screen after connecting to car battery. | Incorrect clamp connection (reverse polarity) or poor connection. | Ensure red clamp is on positive (+) and black clamp on negative (-). Clean battery terminals if corroded. Reconnect securely. |
| Vehicle does not start after jump attempt. | Jump starter battery low, vehicle battery severely discharged, or other vehicle issues. | Ensure jump starter is sufficiently charged. Wait 30 seconds and try again (max 3 attempts). If still unsuccessful, consult a mechanic. |
| Device gets warm during use or charging. | Normal operation under heavy load. | This is normal. If it becomes excessively hot or emits smoke/odor, discontinue use immediately and contact support. |
| Screen displays "Low Temperature Reminder" icon. | Operating temperature is too low for optimal performance. | Bring the device to a warmer environment and allow it to reach operating temperature before use. |
9. Specifications
| Feature | Detail |
|---|---|
| Brand | GOOLOO |
| Model | GT4000S (JS-271) |
| Peak Current | 4000A |
| Engine Compatibility | All Gasoline Engines, up to 10.0L Diesel Engines |
| Battery Type | Lithium Polymer |
| Dimensions (L x W x H) | 51 x 29 x 27 cm (Product); 2 Kilograms (Weight) |
| USB-C Input/Output | 100W Power Delivery (PD) |
| USB-A Output 1 | 5V/2.4A |
| USB-A Output 2 | 5V/9V/12V Quick Charge |
| DC Output | 15V/10A |
| LED Light Type | LED (Normal, SOS, Strobe modes) |
| Waterproof Rating | IP65 |
| Standby Time | Up to 24 Months |
10. Warranty and Support
GOOLOO provides comprehensive support for its products.
- Warranty: The GOOLOO GT4000S comes with an 18-month warranty.
- Customer Support: Lifetime customer and technical support is available.
- Contact: For any questions, issues, or warranty claims, please refer to the contact information provided in the product packaging or on the official GOOLOO website.
Image: GOOLOO customer support details, including 24-hour support, 30-day return guarantee, 18-month warranty, and lifetime technical support.
