Pi 4

Raspberry Pi 4 with UPS 3D Case with 9V/12V In 5V Out UPS design by RioLi

Original 3D Case design by Bigjeffrey

UPS

UPS design by Samkalel3

DIY Step-Down and Step-Up super Cheap UPS for Raspberry Pis: https://www.reddit.com/r/raspberry_pi/comments/nsx3le/diy_stepdown_and_stepup_super_cheap_ups_for/

9V/12V In 5V Out UPS Equipment:

1. Schottky Diodes: 2 x 1N5822 Schottky Diodes
2. Batteries: 3 x 3.7V 18650 battery
3. Battery Protection Circuit: 1 x HX-2S-01
4. Charging Board: 1 x TP5100 Protection/Charging Board
5. Step Down Buck Converter: 1 x XL4015 DC-DC Step Down Buck Converter Power Module
6. Power Jack: 1 x DC 5.5*2.1 Power Jack Female
7. USB Step Up Cable: 1 x 5V to 9V/12V USB Step Up DC Power Cable 5.5*2.1

3D Case

Raspberry Pi 4 snap fit case with 30mm Fan by Bigjeffrey: https://www.thingiverse.com/thing:3726254

I use this Raspberry Pi 4 3D model preview to remix the case.

Raspberry Pi 4 3D Model for Case development by OculusQuest: https://www.thingiverse.com/thing:4621310

Use case

I install Bitfocus Companion on Pi so it is a show control system for broadcast equipment like ATEM and Propresenter and because it have a UPS so my show will more stable.

But i found out i can install Companion on Pc so i just install Homeassistant on my Pi.

My Homeassistant run on my Proxmox before,is was a VM and my Proxmox a not too stable so i just move my Homeassistant to my pi.