1.Open Device Manager :My Computer, select Properties, and Click
Device Manager.
2. Expand the Universal Serial Bus Controller section.
3.You will see a few devices called ‘USB Root Hub’.
3.Click on each one and go to its properties.
4. In the Properties window for each USB Root Hub, go to the Power
Management tab and uncheck the ‘Allow the computer to turn off this device to
save power’ option.
5.Then you are done with it and you can charge your Smartphone
through USB in sleep mode while the laptop-lid is closed.
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