I made a powerbank for 18650 batteries, 4 of them. Please enjoy, there is a youtube video for the assambley (PART 2). There are three different lids for it, if you wish to replace it after a while of use.
Its 2.1A USB pcb-board so you can charge an ipad without problems.
You can buy the parts for the powerbank here:
USB-PCBboard
Battery-holder
Battery 4000 mAh
Battery 3000 mAh
Print Settings
Printer:
prusa
Rafts:
No
Supports:
No
Resolution:
0.2
Infill:
20%
Credits:
thenomadsoul_