This is my first design from scratch.
I did it because I wanted to learn more how to use freecad, and because I'm always moving from home to office, and wanted to have a easy way to slip over my laptop charger under the desk.
The freecad file is available, and it can be changed for any type of box that you want to hold.
There are several different ways to use it, on the table, under table, and you can slip the box in from both sides, or use a clip to hold (as showed in the images).
The project is fully parametrized so, you just need to update the measurements and create your own box.
I printed with PETG because the charger heats up a little bit but I think PLA would be fine though.
It also doesn't need any supports
The author hasn't provided the model origin yet.