Artificial Star for optic collimation from laser

It's a model for creating artificial star tool for optic collimation.

Components:

1) Laser tool for optic fiber connection testing (1mW - not more because no need for more brightness ):
https://aliexpress.ru/item/4001252567240.html

2) accumulator: 18650 Li-Po 3.7 V

3) Optic Fiber cabel: LC/SC/FC/ST/LSH/MU Simplex OS2 SM, connectors: SC UPC
https://www.fs.com/ru/products/12285.html
Screw the bolt with wires instead of tube battarey holder

4) switcher
https://rexant-shop.ru/goods/rexant_36-2010.htm

5) contact pads for accumulator takes from appropriate accumulator box
something like this: https://www.chipdip.ru/product/fc1-5211