"Echo" Powerbank — Anomaly Detector (STALKER)

First of all, I just want you to understand. This is not a simple project, maybe just for now, until I simplify it enough.
My goal was not to make a complete copy from the game, but to give this device everyday-use features. So I made it a powerbank.
It uses an Arduino Nano with an RCWL‑0516 as a motion sensor. Of course, it is not working perfectly, but the idea was to create a feeling that this device is looking for something (and I didn’t want to use just the onboard randomizer). Maximum capacity inside is 5×18650. You can use the best cells you can find or (the hard way) increase the size, for example, for 21700 batteries (I do not recommend doing this, at least if you are not an advanced CAD user).
It has 3 switches: power on/off, buzzer on/off, and mode change (show battery level or motion detection level). You will also need 3 LEDs (2 RGB, 1 red for indicating the on/off state) and a resistor for voltage measuring. Powerbank module is IP5328P Dual USB.
I printed almost everything with Tough Resin Ultra. It is strong enough but has enough flexibility to endure impacts.
To be honest, I was not designing this as a public model, it was a one‑time present, but it became quite a big project, and I decided to share it with the community.

UPD. Added the list of materials. The wiring diagram, code and assembling instruction will be published soon.