The latest device from YARH.IO makes the Raspberry Pi even more portable. The appropriately-called YARH.IO Micro 2 has an IPS display, a keyboard and a replaceable battery. The YARH.IO Micro 2 can be purchased as a complete unit or built at home using a 3D printer and off-the-shelf parts.
https://www.notebookcheck.net/Raspberry-Pi-The-YARH-IO-Micro-2-transforms-the-popular-single-board-computer-into-a-handheld-computer.514958.0.html