powerbank 18650

18650 Power Bank with USB C module.
I chose petg filament for the power bank module because it generates too much heat at full power output for PLA to withstand.
The packaging does not screw on, it is held in place by magnets.

Parts

3D Printed Part
-Power Bank Module for Lithium Battery LX-PB255M      Type C+USB   (SKY BLUE)
https://www.aliexpress.com/item/1005006361300312.html?spm=a2g0o.order_list.order_list_main.89.630918020ibc02
-4pcs Spring Battery Contact 
https://www.aliexpress.com/item/1005006854723334.html?spm=a2g0o.order_list.order_list_main.39.630918020ibc02

-12pcs magnet 3x5mm

https://www.aliexpress.com/item/1005001772350375.html?spm=a2g0o.order_list.order_list_main.164.630918020ibc02
-cable
-3pcs screw for fixing the board
-2pcs battery 18650
-soldering iron