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How to adjust USB power

Updated March 23, 2017

Universal Serial Bus (USB) ports are a convenient way to interface with your computer, either to use USB gadgets or store data externally. Windows offers an easy method for adjusting the power output to your USB ports, so you can conserve battery power and limit access by external devices. Through the Device Manager, you can customise which USB ports receive power, and the settings that govern power output to these devices.

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  1. Open the Device Manager by clicking "Start," "Control Panel," "Hardware and Sound" and "Device Manager."

  2. Expand the "Universal Serial Bus controllers" tree by clicking on the arrow next to that heading. Here, you will see all USB controllers and USB root hubs (USB ports) on your computer.

  3. Right-click on the "USB Root Hub" you want to change, and then click on "Properties" to open the USB port's Properties dialogue box. Under the Power Management tab, you will see the option for restricting power to the USB port to save battery power. Choose your desired settings using the checkboxes and then click on "OK" to save these settings.

  4. Repeat Step 3 for all USB Root Hub devices to customise the power output to your computer's USB ports.

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About the Author

Sam Foner began writing, teaching and performing in 1997. He has presented and lectured for many global associations, including the Young Presidents Organization and Rotary International, and his writing appears on and Foner is a member of Mensa International and holds a Master of Arts in international affairs from Hong Kong University.

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