Although the USB 3.x standard states "any device" may not draw more that 500 mA, there are "charging standards that allow current draw up to 1,500 mA.? Many laptops and other devices have dedicated USB charging ports.? "Most" will allow the high current on the normal USB port
Keep in mind that this works best when you are using a single high current draw device, and any other device on that "hub" is not drawing more than (say) 50 mA.? I do "in vehicle testing".? We have tested devices similar to what Howard showed on a couple of Lenovo and Dell laptops.? In some cases, we had issues with charging the battery during the process and some ground look issues with our other equipment connected to the same laptop.
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Rob KB8RCO
