Connect the Voltmeter: Simply connect the USB voltmeter to the USB port you want to test. The device will display the voltage, current, and power output of the port.

With the help of Device Manager or USBDeview. you can check USB port for Power on Windows 11/10. Easily check the Power Output of USB Ports!

Testing the DC voltage output of the power supply using a digital multimeter can help you isolate any potential issues and determine if you have a bad power supply.

4. A dc-dc output voltage dip with a transient current. Placing a converter near the load minimizes the effect of PCB resistance and parasitic inductance.