9v to USB Charger

This is a mashup of two different project case items to make a snap in 9v battery to usb charging case..

Update:
I added a lid that will fit, I plan on using glue to secure it.
Depending on the design of your usb regulator board, you may have to break off the clips on the bottom and use hot glue.

This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/9FTediJHZg4