I DOCUMENTED THE BUILD ON MY YOUTUBE CHANNEL. PLEASE CLICK THE LINK BELOW!
https://youtu.be/QVikDfqXVUU
Storing batteries can be very dangerous, especially 9 volts. 9 volts are particularlly dangerous because they have both the + and - terminals right next to each other. This can cause these batteries to easily contact something conductive and heat up extremely fast. This extreme heat has been known to cause a fire and do some serious damage. I built the storage unit to not only help in the safety factor, but also to make it easier to know your battery inventory and ease of finding the right battery I need.