All the files are released at:
The main deck is composed of a Fujitsu Esprimo Q920 Mini PC with a 9.7inch "IPad" LCD with a display port adapter board. A 3D printed case with stand.
Just a very quick intro to the "PowerBank"
For the power supply and battery I used a 24V - 6A custom LiFePo4 pack I made for my "Omi Wheel" Rover. You can take a look at the Rover for more information about the battery pack
I made case with a handle and mounted a 300W pure sine inverter to it. All in all a very nice Powerbank.
The Keyboard is a RK61 with has a build in battery and Bluetooth. I connected an ESP32 to the 3V3 power line with the awesome BLE-Gampad library. The sketch is rather simple and in the git repository. (did I mention that everything works over Bluetooth?)