Do you have enough USB ports for all the things you want to plug into your computer? Here are all the ways you can count them to find out an exact number.

To determine the power, current, and voltage of a USB socket, Windows on-board tools, freeware, and test sticks from $10 can be used.

Additional Tips Using a Multimeter: If you have a multimeter, you can also use it to check the voltage of a USB port by connecting it to the external pins of the USB-A connector.