The power draw on that wifi thing is unlikely rated the same as the requirements for charging..
if your mounting $1k of equipment on your dash board.. why not just get a 12v to 5v USB thingy, or a rigblaster/mountian radio power brick with on board USB/5v?
Using the 536hp on a desk, and the 436hp next to it with no usb port near by beside the one on the 536hp right there.
It is just for convenience, and not having to have batteries on the 436hp for example, I wondered if that could be possible to use the 536hp usb port to power it up... (I know that it is originally made for the wifi..)
I am aware of using any adapter and other solutions for the 436hp, my question is strictly focused on the possibility that the 536hp could power the 436hp.