would commodity usb cables and ports survive an over-standard voltage and current?? suppose we want to make an adapter to power a gadget that require more voltage and power than what is allowed by the USB standard. But, suppose we try to use off-the-shelf USB cable in the above-standard demanding gadget and a USB port where that cable would plug in in the adapter. (For safety purposes maybe we would find a cheap way to slightly alter the "hyper usb plug" and "hyper usb port" so that they would mechanically refuse to interoperate with regular ones, but this is off topic for this question). Well, so would the usb cable and port survive usage at higher voltage and current? If we did empirical tests on cables and ports from various manufacturers at let's say 8V and 0.7A, should we expect to find at least some that would work fine, or are they explicitly limited according to the standard and so would melt or something like that?