Antifog Unit 18650

This is my own AntFog unit designed to fit 18650 batteries along with 5015 12v turbine fan. To assemble it you'll need few things:Soldering ironcopper wireFi10/7 silicon tube1x5015 turbine fan (faster the better) I used 7200 RPMs1x Step-Up 3.7V→12V (https://www.aliexpress.com/item/1005007013856492.html?spm=a2g0o.order_list.order_list_main.232.21ef1c248jmk3x)1x 5V 1A USB-C charging module (https://www.aliexpress.com/item/1005006989495574.html?spm=a2g0o.order_list.order_list_main.247.21ef1c248jmk3x)1x switch (https://www.aliexpress.com/item/32812689209.html?spm=a2g0o.order_list.order_list_main.227.21ef1c248jmk3x)Some sponge if you want to silence it a bit.1x 3.7V 2s 18650 indicator (https://www.aliexpress.com/item/1005002598196927.html?spm=a2g0o.order_list.order_list_main.262.21ef1c248jmk3x)1 pair of Battery contacts (https://www.aliexpress.com/item/1005007545550204.html?spm=a2g0o.order_list.order_list_main.272.21ef1c248jmk3x)In general assembly is straightforward and self explanator