About usb hub connector... whay does this things have a power income?

About usb hub connector... whay does this things have a power income?
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1 Answer

Answer :

a non feeded hub doesn’t supply the power needed to charge an iPod etc. it does however have the native power to feed data through, but without a feeded hub i wouldn’t be able to, for instance, charge 4 iPods at the same time
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