In Reply to: RE: Wiring Scheme of Dual Headed USB cable posted by Joe Appierto on August 9, 2014 at 07:39:23:
AFAIK, dual-headed USB cables are used with devices where one USB port may not provide enough current to operate a device. One USB port delivers signal and power, and the other delivers power only. I have owned several USB devices like that, mostly external hard drives. They would not work on some computers, especially laptops, with only the signal/power USB end plugged in.
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