1. Introduction
The Giatero Q21 is a versatile portable device designed to provide emergency jump-starting for 12V vehicles, inflate tires, and serve as a portable power bank. It features a 4000A peak current for jump-starting and a 150PSI air compressor for inflation. This manual provides essential instructions for safe and effective use, maintenance, and troubleshooting.
2. Package Contents
Please verify that all items listed below are included in your package:
- 1 x Giatero Q21 Jump Starter with Air Compressor
- 1 x Smart Jumper Cables
- 1 x Air Pump Hose
- 3 x Gas Nozzles (for various inflation needs)
- 1 x Type-C Charging Cable
- 1 x User Manual (this document)
- 1 x Portable EVA Carrying Case

Image: Contents of the Giatero Q21 Jump Starter package.
3. Product Overview
Familiarize yourself with the components of your Giatero Q21 device:

Image: Front view of the Giatero Q21 device, highlighting the LCD display and control interface.
- LCD Display: Shows battery status, air pressure, and operational modes.
- Power Button: Turns the device on/off and cycles through flashlight modes.
- Air Compressor Controls: Buttons for setting target pressure and starting/stopping inflation.
- Jump Start Port: Connection point for the smart jumper cables.
- Air Hose Port: Connection point for the air pump hose.
- USB Output Ports: For charging external devices.
- Type-C Input Port: For charging the Giatero Q21 device.
4. Charging the Device
Before first use, fully charge the Giatero Q21. Regular charging ensures optimal performance and extends battery life.
- Connect the provided Type-C charging cable to the device's Type-C input port.
- Connect the other end of the cable to a suitable USB power adapter (not included) or a powered USB port.
- The LCD display will indicate the charging status. Charge until the battery indicator shows full.
Important: It is recommended to recharge the device every 2-3 months to maintain battery health, even if not in use.
5. Jump Starting Your Vehicle
Follow these steps carefully to safely jump start a 12V vehicle. Ensure the Giatero Q21 has at least 75% charge before attempting a jump start.
- Prepare the Vehicle: Turn off the vehicle's ignition and all accessories. Engage the parking brake.
- Connect Jumper Cables to Device: Insert the smart jumper cable connector firmly into the jump start port on the Giatero Q21.
- Connect to Car Battery:
- Connect the red (+) clamp to the positive (+) terminal of the car battery.
- Connect the black (-) clamp to the negative (-) terminal of the car battery.
The smart jumper cables will indicate a successful connection with a solid green light. If an error is detected (e.g., reverse polarity), an alarm will sound, and a red light will illuminate. Correct the connection before proceeding.
- Start the Vehicle: Once the smart jumper cables show a safe connection, start your car's engine.
- Remove Cables: Immediately after the car starts, remove the smart jumper cables from the car battery terminals, then disconnect them from the Giatero Q21 device.
Warning: Do not leave the smart jumper cables connected to the car battery for more than 30 seconds after the vehicle has started.

Image: Step-by-step guide for jump starting a vehicle.
6. Using the Air Compressor
The integrated air compressor can inflate tires, balls, and other inflatables up to 150 PSI.
- Connect Air Hose: Screw the air pump hose into the air hose port on the Giatero Q21.
- Attach Nozzle: Select the appropriate nozzle for your item (car tire, bicycle tire, ball, etc.) and attach it to the end of the air hose.
- Connect to Item: Securely attach the nozzle to the valve stem of the item you wish to inflate. The LCD display will show the current pressure.
- Set Target Pressure: Use the '+' and '-' buttons on the device to set your desired target pressure.
- Start Inflation: Press the air compressor start button. The compressor will automatically stop once the target pressure is reached.
- Disconnect: Remove the nozzle from the item and detach the air hose from the Giatero Q21.
Caution: Do not operate the air pump continuously for extended periods. If the compressor becomes hot, allow it to cool down for several minutes before resuming operation.

Image: Using the Giatero Q21 as a portable tire inflator.
7. Using the Flashlight
The Giatero Q21 includes a multi-mode LED flashlight for illumination in low-light conditions.
- Press and hold the power button to turn on the flashlight.
- Press the power button repeatedly to cycle through the modes: Solid Light > Strobe Light > SOS Signal > Off.
8. Power Bank Function
The device can charge various electronic devices via its USB output ports.
- Connect your electronic device (e.g., smartphone, tablet) to one of the USB output ports on the Giatero Q21 using a compatible USB cable.
- The Giatero Q21 will automatically begin charging your device.

Image: The Giatero Q21 functioning as a portable power bank.
9. Safety Precautions
The Giatero Q21 is equipped with 10 intelligent safety protections, including reverse polarity protection, over-current protection, and short-circuit protection. Always adhere to the following safety guidelines:
- Read and understand all instructions before use.
- Do not attempt to jump start a frozen battery.
- Ensure proper connection of jumper cables (red to positive, black to negative) to avoid sparks or damage.
- Do not connect the positive and negative clamps together.
- Keep the device away from children.
- Operate the device within the specified temperature range of -4°F to 140°F (-20°C to 60°C).
- Do not expose the device to rain or immerse it in water.
- Do not disassemble or modify the device.
- If the device emits smoke or unusual odors, discontinue use immediately.

Image: Advanced intelligent protection chip and operating temperature range.
10. Troubleshooting
If you encounter issues with your Giatero Q21, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not turn on. | Low battery or device is off. | Charge the device fully. Press and hold the power button to turn on. |
| Car does not jump start. | Low device charge, incorrect cable connection, or severe battery issue. | Ensure device is over 75% charged. Check cable connections (red to +, black to -). If car battery is severely damaged, it may not start. |
| Air compressor not inflating. | Hose not securely connected, target pressure not set, or device overheating. | Ensure air hose is tightly screwed in. Set target pressure on LCD. Allow device to cool if it has been running continuously. |
| Smart jumper cables alarm/red light. | Incorrect connection (e.g., reverse polarity). | Disconnect clamps and re-connect them correctly: red to positive (+), black to negative (-). |
11. Specifications
| Feature | Specification |
|---|---|
| Model | Q21 |
| Peak Output Current | 4000 Amps |
| Air Compressor Pressure | Up to 150 PSI |
| Engine Compatibility | All Gas / 10.0L Diesel engines (12V) |
| Operating Temperature | -4°F to 140°F (-20°C to 60°C) |
| Dimensions | 8"D x 5"W x 6"H |
| Item Weight | 1.9 Pounds |
| Battery Type | Lithium Polymer (included) |
12. Maintenance and Storage
Proper maintenance and storage will ensure the longevity and reliability of your Giatero Q21.
- Charging: Recharge the device every 2-3 months to keep the battery active and prolong its lifespan.
- Cleaning: Wipe the device with a dry, soft cloth. Do not use harsh chemicals or abrasive materials.
- Storage: Store the device in its portable EVA carrying case in a cool, dry place, away from direct sunlight and extreme temperatures.
- Cable Care: Inspect jumper cables and air hose for any damage before each use. Replace if necessary.
13. Warranty and Support
Giatero is committed to providing high-quality products and customer satisfaction. If you encounter any issues with your Giatero Q21 Jump Starter with Air Compressor, please do not hesitate to contact our customer support team. We will endeavor to resolve your concerns promptly.
For support, please refer to the contact information provided with your purchase or visit the official Giatero website.