1. Introduction
The Gaqqee LLYt-02 USB Charging Tester Power Meter is a compact and intelligent device designed to monitor the charging performance of your Type-C devices. It features a digital display that shows real-time power (in Watts) and indicates fast charging status (PD). This manual provides detailed instructions on how to set up, operate, and maintain your device.
2. Product Features
- Compact and portable design.
- Stable performance with fast charging protection.
- Supports Power Delivery (PD) fast charging.
- Visible charging speed and real-time power monitoring (up to 99W).
- Detects true or false fast charging status.
- Supports Type-C cable extension and transfer.
- Automatic recognition of connected devices.
- Compatible with phones, tablets, and notebooks.
3. Setup and Connection
The LLYt-02 USB Charging Tester is designed for simple plug-and-play operation. Follow these steps to connect the device:
- Identify the male (input) and female (output) Type-C ports on the tester. The male end is typically inserted into the power source or device, and the female end receives the charging cable.
- Plug the USB-C3.0 (Male) end of the LLYt-02 tester into your power source (e.g., wall charger, power bank, laptop's Type-C port).
- Connect your device's charging cable into the USB-C3.0 (Female) port of the LLYt-02 tester.
- Connect the other end of your charging cable to your phone, tablet, or notebook.
- Once connected, the digital display on the tester will illuminate, showing the real-time charging power.


4. Operating Instructions
The LLYt-02 provides immediate visual feedback on your charging process.
4.1 Reading the Display
- Power Display (W): The main numerical value indicates the current charging power in Watts (W). This value updates in real-time.
- PD Icon: A "PD" icon will appear next to the power reading if the device detects a Power Delivery (PD) fast charging protocol.
- Fast Charging Indication: The presence of the "PD" icon signifies that fast charging is active. If the PD icon is not displayed, it indicates standard charging or a non-PD fast charging protocol that the tester might not specifically label as "PD".

4.2 Fast Charging Detection
The tester helps you verify if your charger and cable combination is truly delivering fast charging. By observing the "PD" icon and the power output, you can confirm the charging speed.


5. Maintenance
To ensure the longevity and accurate performance of your Gaqqee LLYt-02 USB Charging Tester, please follow these maintenance guidelines:
- Keep the device clean and dry. Avoid exposure to liquids, dust, and extreme temperatures.
- Handle with care to prevent physical damage to the ports or the display.
- Store the tester in a safe place when not in use, away from direct sunlight or excessive heat.
- Do not attempt to disassemble or modify the device, as this will void the warranty and may cause damage.
6. Troubleshooting
If you encounter issues with your LLYt-02 tester, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Display does not light up. | No power connection or faulty cable/charger. | Ensure the tester is properly plugged into a working power source. Try a different Type-C cable or charger to rule out external issues. |
| Incorrect power reading or no "PD" icon. | Non-fast charging cable/charger, or device not requesting fast charge. | Verify that your charger and cable both support fast charging (e.g., Power Delivery). Ensure your device is capable of and requesting fast charging. Some devices only fast charge when the battery is low. |
| Loose connection. | Ports not fully engaged. | Ensure all Type-C connections are firmly seated. |
7. Specifications
| Parameter | Value |
|---|---|
| Product Model | LLYt-02 |
| Color | Black |
| Interface Format | Type-C Male to Type-C Female |
| Maximum Display Power | 99W |
| Maximum Supported Power | 30V/6A |
| Dimensions (L x W x H) | 31.5mm x 12.5mm x 6.5mm (1.24in x 0.49in x 0.26in) |
| Certification | CE |
| DIY Supplies | Electrical |

8. Warranty and Support
For warranty information, technical support, or any questions regarding your Gaqqee LLYt-02 USB Charging Tester, please contact the seller or manufacturer directly through your purchase platform. Keep your proof of purchase for any warranty claims.





