What you need for this build:

1. Cheapest 5V Boost Step Up Power Module (https://www.aliexpress.com/item/33033622653.html?spm=a2g0s.9042311.0.0.10f24c4d5Muy9o)
2. One 18650 battery
3. USB Light from IKEA (https://www.ikea.com/cz/cs/p/jansjoe-lampa-led-s-usb-cerna-70291232/)
   I use hot glue for locking the module in powerbank cap, and a superglue to glue the parts together.

Print instructions

Print Settings

Printer Brand: Prusa

Printer: I3 MK3S

Rafts: No

Supports: No

Resolution: 0,2

Infill: 100

Filament: Prusament PLA Galaxy Silver