Off-Grid Cyberdeck is a DIY product that can be used for emergencies when the usual PC is disconnected. The Pelican case contains a set of computers and batteries, and when the cover is closed, it is waterproof and protected from electromagnetic waves.
Now, it is possible to connect to the Internet to update the software, but it is made under the assumption that it is used even in an emergency situation where Internet access is not available. Made by an electronics expert, the display adopts an official 7-inch Raspberry Pi touch screen that operates at 5V, so there is no need for a mouse. The inner frame was made with a 3D printer and was also accompanied by quite long wiring that could be used as an emergency spare wire.
The developer made a similar PC in 2015, but this time he used a 3D printer to reduce parts or materials as much as possible. It is said that the main frame took more than 24 hours to print. Related information can be found here.