Amazon.com: Miuzei Raspberry Pi 4 Touchscreen with Case Fan, 4 inch IPS Touch Screen LCD Display, 800x480 HDMI Monitor for RPI 4b 8gb/4gb/2gb with Touch Pen (Support Raspbian/Kali/Octopi/Ubuntu)- No Raspberry Pi :
Ugeek Metal Portable Box Kit With Battery|aluminum Alloy Cnc Case+2.2 Inch Screen+ups Hat+battery|raspberry Pi 3 Model B/3b+/2b - Demo Board - AliExpress
Design and build a Raspberry Pi Zero 18650 Li-ion Battery Power Supply HAT
Raspberry Pi: Turn the popular single-board computer into a compact handheld with a battery, keyboard and display - NotebookCheck.net News
This Ruggedized Raspberry Pi Was Built To Be Copied | Hackaday