Rainy day project to build a USB powerbank. I use a module that has 2 USB standard ports plus USB "C" and Apple Lightning. A micro USB port is used to charge the 4 18650 cells I recovered from old laptop battery packs.

I could not get my slicing software to create the supports for the opening so I made my own! They are easily removed.

My method of changing the filament partway though a print can be seen here : https://youtu.be/AECA_MMiNBE

The module I used is here : USB Quick Charge 3.0 Power Bank Kit http://bit.ly/DIY_PowerBank

See the build on YouTube : https://youtu.be/wNFj-hmjo4A