This is a simple case for a portable led lamp.
I've used the following components:
1. 12V 4035 cob led (the one in the photo)
2. 7x18650 batteries connected in parallel
3. 1 x usb-c li-ion battery charger (the one in the photo)
4. 1 x dc-dc step up converter set on 12v output
5. 1 x switch 15x21mm