If you looked at the comments and questions on the Cube i9 page of http://www.cube-tablet.com/cube-i9.html
You’d see the USB3.1 port installed in the Cube i9 does not support Charging over USB3.1 (No power delivery)
I did some reading on USB3.1 and found that its really a “beta” like standard and “Type C” is just the name of the connector, So you can have companies say their product has USB Type C support, but that just means the Reversible connector, it could even end up being just a USB3.0 speed connection in a Type-C port. USB3.1 is very….troublesome, its one name that means too many things; unlike USB3.0, USB3.1 comes in too many flavours ( some without charging over usb support, display out support, just USB3.0 in a Type-C port form…the list goes on)…side-fact, USB3.0 was supposed to come out with Type-C so you could tell the different between USB2 and USB3. but Type-C wasn’t “ready” at the time USB3.0 came out.