This tiny case is used to house a charge/undervolt controller for 18650 batteries. The case is press-fit and it pretty tight once snapped together. The leads for the controller are exposed in the back. This is part of an RGB LED Acoustic Panel project utilizing an 18650 battery and a WeMos D1 clone.
For the whole project: https://youtu.be/R97AF6qJvv8
Category: ElectronicsThe author marked this model as their own original creation. Imported from Thingiverse.