1. Product Overview
The ANENG P01 USB Tester is a multi-functional digital device designed to monitor and display real-time information about USB power. It can measure voltage, current, power, cumulative capacity (mAh), cumulative energy (Wh), load resistance, and temperature. It features a VA color display, screen flip function, power-off memory, and data reset capabilities, making it an essential tool for testing various USB charging devices.

ANENG P01 USB Tester in action, showing its VA Color Display and Type-C adapter compatibility.
2. Package Contents
Please check the package for the following items:
- 1 x ANENG P01 USB Tester
- 1 x USB to Type-C Adapter
- 1 x User Manual
- 1 x Packaging Box

Included accessories: USB Tester, Adapter, Manual, and Packaging Box.
3. Product Features and Components
Key Features:
- Compact Size: Easy to carry around.
- VA Color Display: Clear readings even in dark environments.
- USB-A Output: Stable connection, more accurate data.
- Premium Chip: High-precision measurement.
- Screen Flip: Rotates 180° freely for easy viewing.
- Power-Off Memory: Accumulated data is preserved during unexpected power failures.
- Multi-Function Data Reset: Reset capacity, power, and time with simple button presses.
- Type-C Adapter: Built-in adapter for instant compatibility with phones, laptops, and other Type-C devices.
Component Identification:

Product dimensions and labeled components.
- USB-A Input Port
- Display Screen
- USB-A Output Port
- Multi-function Button
- Type-C Adapter
Screen Interface Information:

Detailed breakdown of information displayed on the tester's screen.
4. Setup and Basic Operation
Connecting the Tester:
To begin monitoring, simply plug the ANENG P01 USB Tester into a power source (e.g., wall charger, power bank, computer USB port) via its USB-A Input Port. Then, connect your device (e.g., phone, tablet, laptop) to the USB-A Output Port of the tester using its charging cable. The display will automatically light up and show real-time measurements.

Real-time display shows whether charging is normal 5V slow charging or 9V/12V true fast charging.
Using the Type-C Adapter:
For devices with a Type-C port, attach the included USB to Type-C adapter to the USB-A Output Port of the tester. This allows you to measure without limits across various devices like mobile phones, tablets, and laptops.

The built-in USB-to-Type-C adapter ensures compatibility with various devices.
5. Advanced Operation
Screen Rotation:
To rotate the display 180 degrees for easier viewing:
- Press the multi-function button briefly until the 'Screen rotation' interface appears.
- Press and hold the button on this interface to rotate the screen 180 degrees.

The screen can be rotated 180 degrees for optimal viewing.
Data Item Reset:
The functional button allows for itemized reset of capacity, power, and time. This ensures no duplicate data and more precise measurements.

Detailed instructions for resetting data items on the display.
- Reset Capacity (mAh): Double-click the button.
- Reset Power (Wh): Triple-click the button.
- Reset Time: Quadruple-click the button.
- Reset All Values (Capacity, Power, Time): Long press the button.
Power-Off Memory Function:
This product features a power-off memory function. If the tester is accidentally disconnected during testing, accumulated data is fully preserved, preventing any loss of progress.

Data recording continues even after unexpected power failure.
Power Bank Capacity/Power Detection Steps:

Follow these steps to accurately measure power bank capacity.
- Fully Charged Preparation: Fully charge the power bank to be tested, ensuring it is in a fully charged initial state.
- Correct Connection: Connect the input port of the USB tester to the output port of the power bank. Then, connect the phone charging cable to the output port of the USB tester.
- Data Reset: On the USB tester's Figure 1 or Figure 2 interface, press and hold the button to reset the capacity (mAh), energy (Wh), and time to zero.
- Discharge Record: Start the load device (such as turning on the phone screen and running applications) to begin discharging, and continue until the power bank is completely depleted and automatically shuts down.
- Read Result: After the discharge is complete, the final accumulated capacity (mAh) and accumulated energy (Wh) values displayed on the screen represent the actual usable capacity and energy of the power bank.
6. Maintenance and Calibration
Current Zero Calibration Procedure:
To ensure accurate current readings, perform a current zero calibration:

Detailed steps for current zero calibration.
- Turn on the tester: Connect the input terminal of the tester to the powered-on charging head, and the screen will automatically light up.
- Enter screen-off state: Press the button briefly until the screen enters the screen-off state (completely black with no display).
- Enter background mode: While the screen is off, press and hold the button until the screen lights up again, displaying the background calibration interface.
- Select the reset item: After entering the background mode, the default position is on the first column. Press the button briefly once to switch to the second column.
- Perform no-load zeroing: Press and hold the button to execute zeroing; the current value on the screen will change to 0.000A and automatically jump to the third column.
- Exit the background mode: Press the button briefly to switch to Exit, then press and hold the button to exit the background calibration mode.
- Calibration completion confirmation: After exiting, the screen will return to Function Interface 1 (the initial measurement interface). At this point, observe the current display value, which should be 0.000A, indicating that the current zero calibration has been completed.
General Care:
- Keep the device dry and clean.
- Avoid extreme temperatures and direct sunlight.
- Do not attempt to disassemble or modify the device.
7. Troubleshooting
- Inaccurate Readings after Calibration: If readings are inaccurate after calibration, ensure that during the 'Current Zero Calibration Procedure' (Step 4), you only select the second column for the reset operation. Setting it to any other column will result in inaccurate measurements.
- Time Not Accumulating: The time displayed on the U-meter only counts when the power is greater than 0.5W. If the power is less than 0.5W, the system will not calculate the accumulated time. This is by design to accurately determine charging time.
- No Display: Ensure the tester is properly connected to a powered USB port. If the screen remains off, try a different USB port or power source.
8. Specifications
| Feature | Specification | Feature | Specification |
|---|---|---|---|
| Monitor Voltage V | Yes | Measurement Time | Yes |
| Monitor Current A | Yes | Power-Off Memory | Yes |
| Real-time Power Calculation W | Yes | Screen Flip | Yes |
| Cumulative Capacity mAh | Yes | Current Reset | Yes |
| Cumulative Energy Wh | Yes | VA Inverse Color Display | Yes |
| Load Resistance Ω | Yes | Voltage Range | 4V-30V |
| Temperature Detection °C/°F | Yes | Data Reset | Capacity, Energy, Time |
| No Battery Required | Yes | Weight | USB Tester: 12g, Adapter: 3g |
| Display Type | Digital Only | Certification | CE |
| Origin | Mainland China |
The parameters are for reference only, and the actual measurement of the specific equipment shall prevail.
9. User Tips
- For accurate charging time measurement, ensure the power draw is consistently above 0.5W, as the device will not accumulate time below this threshold.
- When performing current zero calibration, always ensure you are in the correct background mode and select only the second column for the reset operation to avoid inaccurate readings.
- Utilize the 180-degree screen flip feature for comfortable viewing in any orientation.
- The power-off memory is a convenient feature; however, it's good practice to note down critical measurements if you anticipate prolonged power interruptions.
10. Warranty and Support
For any warranty claims, technical support, or further inquiries, please contact the ANENG Official Store directly through your purchase platform. Keep your proof of purchase for faster service.





