1. Introduction
The Giatero 4000A Car Jump Starter (Model COCY-001) is a powerful and versatile device designed to provide reliable emergency power for your vehicle and electronic devices. With a peak current of 4000A, it can safely jump-start 12V vehicle batteries, supporting engines up to 10.0L gasoline and 8.0L diesel. Beyond jump-starting, it functions as a portable power bank with USB outputs and features a multi-mode LED flashlight for various situations. Its compact and durable design ensures it's a dependable companion for any journey.
2. What's in the Box

Image: Giatero 4000A Car Jump Starter, smart clamps, USB-C cable, instruction manual, and carrying bag.
- Giatero 4000A Jump Starter Unit
- Safety Jumper Cables (Smart Clamps)
- USB-C Cable
- Instruction Manual
- Carrying Bag
3. Setup and Charging
Before first use, ensure the jump starter is fully charged. The device features LED indicators to show the battery level (25%, 50%, 75%, 100%).
- Charging the Unit: Connect the provided USB-C cable to the jump starter's input port and plug the other end into a compatible USB power adapter (not included). The LED indicators will light up progressively as the unit charges.
- Checking Battery Level: Press the power button on the unit to check the current battery level indicated by the blue LED lights.

Image: Close-up of the Giatero jump starter showing the Type-C input port and USB output ports for charging.
Video: Demonstrates how to charge the Giatero jump starter using the USB-C cable and how to check the battery indicator lights.
4. Operating Instructions
4.1. Jump Starting a Vehicle
Ensure the jump starter has at least 75% charge before attempting to jump-start a vehicle.
- Connect Jumper Cables: Insert the smart clamp connector into the jump starter's dedicated port.
- Attach to Battery: Connect the RED clamp to the vehicle's positive (+) battery terminal and the BLACK clamp to the vehicle's negative (-) battery terminal. The indicator light on the smart clamp should show a solid green when correctly connected and ready. If it flashes red or beeps, check connections or battery status.
- Start Vehicle: Start your vehicle's engine.
- Remove Clamps: Once the engine starts, immediately remove the jumper cables from the vehicle battery within 30 seconds. Then, disconnect the smart clamp from the jump starter.

Image: Visual guide illustrating the four steps to jump-start a car: connect to booster, connect clamps to battery, start engine, remove clamps.
Video: Demonstrates the process of connecting the jump starter to a car battery and successfully starting the vehicle.
4.2. Using the LED Flashlight
The Giatero jump starter features a 400-lumen LED flashlight with multiple modes.
- Turn On/Off: Press and hold the power button on the unit for a few seconds to turn the flashlight on or off.
- Switch Modes: Briefly press the power button to cycle through the modes: Flashlight (steady light), Strobe Light (flashing), and SOS Light (Morse code signal).

Image: A person utilizing the bright LED flashlight of the Giatero jump starter to illuminate a car engine bay at night.
Video: Shows the three LED lighting modes (Flashlight, Strobe, SOS) of the Giatero jump starter.
4.3. Using as a Power Bank
The jump starter doubles as a portable power bank to charge your electronic devices.
- Connect your device's USB charging cable to one of the two USB output ports (USB 5V 3A, USB 5V 2.1A) on the jump starter.
- The jump starter will automatically begin charging your device.

Image: The Giatero jump starter acting as a power bank, charging a smartphone, smartwatch, and a portable gaming device simultaneously.
5. Safety Features and Precautions
The Giatero jump starter is equipped with an advanced safety system to ensure safe and reliable operation.
- Over-Charge Protection: Prevents overcharging of the internal battery.
- Over-Current Protection: Protects against excessive current flow.
- Short-Circuit Protection: Automatically shuts off in case of a short circuit.
- Reverse-Polarity Protection: Prevents damage from incorrect clamp connections.
- Low-Temp/High-Temp Protection: Operates safely within specified temperature ranges.
- Over-Voltage Protection: Safeguards against voltage surges.
- Over-Load Protection: Prevents damage from excessive load.
- Spark-Proof Protection: Ensures no sparks during connection.
- Reverse-Charge Protection: Prevents current flow back from the vehicle battery.
General Precautions:
- Do not connect the RED and BLACK clamps together.
- Do not attempt to jump-start a vehicle if the jump starter's battery level is below 75%.
- If a second start is required, wait at least 120 seconds before attempting again.
- Remove jumper clamps from vehicle battery within 30 seconds once the engine starts.

Image: Comprehensive diagram detailing the 10 intelligent safety protections built into the Giatero jump starter.
6. Maintenance
- Store the jump starter in its carrying bag in a cool, dry place away from direct sunlight and moisture.
- Recharge the unit every 3-6 months, even if not used, to maintain optimal battery health.
- Keep the clamps clean and free from dirt or corrosion.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Jump starter not turning on. | Low battery or unit is off. | Charge the jump starter. Press and hold the power button to turn on. |
| Smart clamp indicator flashes red/beeps. | Incorrect connection, low vehicle battery voltage, or short circuit. | Check positive/negative connections. Ensure vehicle battery is 12V. If issue persists, consult manual. |
| Vehicle does not start after jump. | Vehicle battery too low, engine issue, or jump starter not fully charged. | Ensure jump starter is >75% charged. Wait 120 seconds before re-attempting. If still no start, seek professional assistance. |
8. Specifications
- Brand: Giatero
- Model: COCY-001
- Peak Current: 4000 Amps
- Starting Voltage: 12V
- Engine Compatibility: Up to 10.0L Gas / 8.0L Diesel
- USB Output 1: 5V/3A
- USB Output 2: 5V/2.1A
- Type-C Input: 15W
- Flashlight: 400-lumen LED with Flashlight, Strobe, SOS modes
- Water Resistance: IP65-rated enclosure
- Item Weight: 1.94 pounds
- Dimensions: 8.9 x 4.72 x 3.5 inches
- Manufacturer: Dongguan Huaqing Technology Co., LTD
9. Warranty & Support
For warranty information or technical support, please refer to the contact details provided in your product's instruction manual or visit the official Giatero website. Giatero is dedicated to producing reliable portable car battery jump starters and offers customer support to ensure your satisfaction.
You may also consider purchasing extended protection plans available on Amazon for additional coverage: