This model is the negative form of the shoe for connecting an Einhell Power X-Change battery.
This means you can use this shape to cut out the appropriate recess on any other model.
Technically, this model is not based on the model https://www.printables.com/de/model/98134-usb-quickcharge-30-adapter-for-einhell-power-x-cha by Hans, but has been completely recreated in OpenSCAD format. The model of the house was only used to make it easier to determine the dimensions.
The author remixed this model.