Is there a usb-c hub with its own battery?

[Drael646464]

Seems like this would be THE boss thing to have with a tablet or slimline. A usb-c hub with its own powersource for charging. Say, 10,000 MaH battery, and three ports. This way you could not only use your peripherals anywhere, but use your device with your peripherals for longer.

Combine with that fold up projector screen on kickstarter, and you'd have yourself a desktop you could literally set up in a park, on the beach, or a music giging set-up that would be as light to travel with as humanly possible.