You need to lift the ground on whatever you're plugging it into the wall with, so either use a usb wall plug with a plastic ground pin or crack it open and disconnect the ground wire. Easiest way to do this is with an extension lead without a molded plug. Unscrew the plug head and disconnect the ground wire from the pin.
You need to lift the ground on whatever you're plugging it into the wall with, so either use a usb wall plug with a plastic ground pin or crack it open and disconnect the ground wire. Easiest way to do this is with an extension lead without a molded plug. Unscrew the plug head and disconnect the ground wire from the pin.