I have an iPad2. I extended my charging cable by adding a standard USB cable between the iPad cable and the wall adaptor plug. Well my husband needed a USB cable so I took it off and found another short usb cable in my box. But this one was thinner and charged my ipad slower. So my question is....are there different kinds of usb cables, like for usb 2 & 3? Is this one good for anything or should I just throw it away?

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