1. Product Overview
The Gaqqee Dual USB Type-C Tester is a multi-functional digital display device designed for real-time monitoring of electrical charging status. It can measure various parameters including current, voltage, power, energy (capacity and power accumulation), resistance, timing, capacity group number, and temperature. This tester is ideal for evaluating the performance of chargers, data cables, power banks, notebooks, cell phones, and other Type-C digital devices.

Key Features:
- Multi-Parameter Display: Simultaneously shows current, voltage, power, energy, resistance, timing, and temperature.
- Real-time Monitoring: Continuously tracks charging voltage and current.
- Display On/Off Function: Allows turning off the display while charging, useful for night charging.
- Wide Compatibility: Suitable for testing various USB and Type-C devices.
- Fast Charging Protocol Detection: Automatically identifies and supports PD2.0, 3.0, PPS, QC2.0, 3.0, AFC, PE, and other fast charging protocols.
- Data Record: Can record up to 9 sets of measurement data for power bank/battery capacity tests (relative value).
2. Setup and Connection
This section guides you through connecting the Dual USB Type-C Tester to your devices.

- Identify Ports: Refer to Figure 2 to identify the Type-C Input Port, Type-C Output Outlet, 8A High Current USB Input Port, USB Outlet, Mode Key, and On-Off Key.
- Connect Input: Plug the input side of the tester (either the Type-C Input Port or the 8A High Current USB Input Port) into your power source (e.g., wall charger, power bank, computer USB port).
- Connect Output: Plug your device (e.g., mobile phone, tablet, USB fan, Type-C load) into the corresponding output port of the tester (either the Type-C Output Outlet or the USB Outlet).
- Power On: The tester should automatically power on and display readings once connected to a power source and a load.
Note: The Type-C connector input serves as the input, and the Type-C output serves as the output. Ensure you connect the power source to the input port and the device to be charged/tested to the output port. A Type-C connector without a load connected will not display readings.

Operation Video:
Video 1: Demonstrates connecting the tester to a phone and switching between display pages.
3. Operating Instructions
The tester features a multi-functional button for navigating through its various display modes and settings.

Button Functions:
- Short Press Mode Button: Briefly press the mode button to switch between different display screens. This allows you to view various parameters such as voltage, current, power, energy, timing, and temperature.
- Quick Triple-Tap Switch Button: To reset the accumulated power (mWh) and timing for the current data group to zero, quickly tap the switch button three times.
- Long Press On/Off Button (2 seconds): Press and hold the on/off button for 2 seconds to change the cumulative data storage group number (NO.X). The tester can store up to 9 sets of data.
- Display On/Off: Short press the multi-functional key to switch the interface to the rest screen interface to turn off the display. The device will continue charging normally even with the display off.


4. Specifications
Detailed technical specifications for the Gaqqee Dual USB Type-C Tester:
| Parameter | Value |
|---|---|
| Voltage Measurement Range | DC 4.5~50V |
| Current Measurement Range | 0-5A / 0-8A (model dependent) |
| Capacity Totalization Range | 0-99999mAh |
| Power Accumulation Range | 0-99999mWh |
| Power Measurement Range | 0-150W |
| Impedance Measurement Range | 1-999.9Ω |
| Temperature Measurement Range | 0-80℃ |
| Timing Time | 999 hours and 59 minutes |
| Input Interface | Type-C / USB (model dependent) |
| Output Interface | Type-C / USB (model dependent) |
| Refresh Time | >500mS/times |
| Measurement Rate | Approximately 0.5 times/second |
| Display | IPS true color digital LCD screen |
| Self-Consumption Current | <0.02A |
| Operating Temperature | -10~60°C |
| Working Humidity | 10~80%RH (no condensation) |
| Working Air Pressure | 80~106kPa |
| Certification | CE |
| DIY Supplies | Electrical |
Product Dimensions:
- Type-C Only Model: 74mm x 28mm x 13mm (2.91in x 1.10in x 0.51in)
- USB+Type-C Model: 77mm x 40mm x 13mm (3.03in x 1.57in x 0.51in)


5. Maintenance
To ensure the longevity and accuracy of your Gaqqee Dual USB Type-C Tester, follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to clean the device. Avoid using abrasive cleaners or solvents that could damage the display or casing.
- Storage: Store the tester in a cool, dry place away from direct sunlight and extreme temperatures.
- Handling: Handle the device with care to prevent physical damage. Avoid dropping or subjecting it to strong impacts.
- Moisture: Keep the tester away from water and high humidity to prevent internal damage.
6. Troubleshooting
If you encounter issues with your Dual USB Type-C Tester, refer to the following common problems and solutions:
- No Display/No Readings:
- Ensure the tester is properly connected to both a power source (input) and a device (output).
- Verify that the power source is active and providing power.
- Check if the connected device is drawing power (i.e., not fully charged or in a low-power state).
- Remember that a Type-C connector without a load will not display readings.
- Incorrect Voltage/Current Readings:
- Ensure all connections are secure and free from debris.
- Test with different cables and devices to rule out external factors.
- If readings are consistently inaccurate after prolonged use, the device may require recalibration or service.
- Button Not Responding:
- Ensure the button is not stuck or obstructed.
- Try pressing firmly and deliberately.
7. User Tips
Here are some helpful tips from other users to enhance your experience with the tester:
- Understand Input/Output: Always connect the power source to the designated input port (U-INPUT or C-INPUT) and the device you wish to test/charge to the output port (U-OUTPUT or C-OUTPUT). Connecting a power source to an output port will not work and may damage the device.
- No Load Display: If you connect the Type-C input but no device is connected to the Type-C output, the display may remain blank. This is normal behavior.
- Capacity Testing: When testing power bank or battery capacity, remember that the recorded data provides a relative value. For precise, absolute capacity measurements, specialized equipment is typically required.
- Monitoring Fast Charging: Utilize the fast charging protocol detection feature to verify if your charger and cable are delivering the expected fast charge to your device.
8. Warranty and Support
For any issues not covered in this manual or for further assistance, please contact the seller or manufacturer's support channel. Keep your purchase receipt as proof of purchase for any warranty claims.





