Power bank 10000mah

This is a DIY power bank that can charge two apparels simultaneously. It is easy to print and assemble.

Parts needed:
Module: https://www.aliexpress.com/item/New-Electric-Usb-Dual-USB-5V-1A-2-1A-Mobile-Power-Bank-18650-Battery-Charger-PCB/32705379060.html

Battery case: https://www.aliexpress.com/item/5pcs-lot-New-Power-Bank-18650-Battery-Holder-Plastic-Battery-Holder-Storage-Box-Case-for-1x/32813026986.html

4x 18650 Lithium Batteries
4xm3 screws