What's a double male ended USB cord for? - Quora
Answer: A classic USB port can only provide about 500mA of current. Older external hard drives that needed more power than that used a double-headed cable (sometimes called a “Dual-A” or “Y” cable) to draw power from two different ports to “cheat” the power limits. The dual headed cable is not re
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0.5m DOUBLE ENDED Shielded USB 2.0 Male to Male (Type A) 50cm Fast
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Double Ended Usb Cord