Layman - Any example circuit made by anyone ? have video ?

[bilalinamdar]

Hi,
This project was great as i got to know when i entered this circuit making.
Idea to design - it is very difficult. I somehow managed everything on breadboard with power from usb.
But when we plan battery based project we now have to think about efficiency, usage, reliability, safety, longevity and budget.
What i thought that this will be full filled easily because someone might have done this already but to my surprise it is not available easily or i haven't came across similar project.

I am a big fan of the swiss accent guy!

Please guide me where to look for a premade reliable circuit for Lithium ion with efficient, safetly relaibility and budget.
I am asking this because this project is halted due to supply chain issue (as i read from the existing thread).

Please guide me in the right direction to make my idea to production !