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Adaptor for Powered USB

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I have an old HP NC4000 laptop. It has two USB ports, and one of them is a Powered USB for External Multibay. I use it to connect the external DVD-ROM drive that came with that laptop. Now I want to use that external DVD-ROM with a different laptop, but I can't figure out how to connect it. That powered USB connector looks like a regular USB connector but with a small stick next to it. How to plug it into a regular USB port? Is there some sort of adaptor that I can use?
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That connector on the DVD drive is custom-made to fit the special USB port on the laptop - it's got a pin which carries voltage supply from the laptop, with the USB part of the connector used only for data transfer. This means unfortunately the drive can't be plugged into any other laptop unless it has the same type of USB port combined with a power supply pin.
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