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How do I install a USB outlet in my wall?

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USB 2.0 ports allow a current rating of 1.1 A at 5 V DC. ... In THAT case, the USB port will charge your (old) smartphone faster! But most modern wall chargers give a 1.2 A rated output for phones and 2 A rated output for tablets. So they will charge your device faster than if it were to be connected to a USB port.

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