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How to power external hard drive with usb

Last response: in Storage
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November 26, 2010 2:17:04 AM

Hello,
Can i power up my external hard disk with usb-dc converter cable instead of using an adapter...will it affect my laptop..

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a c 271 G Storage
November 27, 2010 11:42:31 PM
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A standard USB port is current limited to 500mA @ 5V. This will limit you to 2.5" drives or smaller. I haven't seen a "USB-DC" converter, but you may need to pick up power from two USB ports if a single port cannot supply the additional current (eg 850mA for Seagate Momentus) during spinup.
December 8, 2010 1:41:11 AM

Best answer selected by jeraldmilton.
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