The file 'Simple DIY PowerBank – 18650 Holder 3D Printer Model' is (stl) file type, size is 45.3KB.
3 in 1! 18650 charger, device charger and power bank!
It uses very low cost parts and works fine. Input current (battery charge) - 1A, output (device charge) - 0.5A. It is very small and you always can take as much battery cells as you want it.
Hope a lot of photos will help you to build it!
Partlist:
PowerBank.stl | 209.5KB |