After my previous design people asked me if I can make a bigger one that can contain 50+ batteries.

In the pictures you can see the frustrating process of testing.

(best part of modeling is to make design that other people can use and are happy with)

Se here is the new AA battery storage. It is higher, deeper and overall just bigger! It can easily contain around 55 batteries. 

Update: according to @ASackOPotatoes who had enough batteries, 62 AA batteries will fit!

I also tested the slot so they will keep rolling and won't get stuck anymore. The final design came out with the best properties of all the different versions which is; maximum of two batteries that will fit through the slot and stack on each other. But keeping in mind the idea I started with, easily picking them out of the container.

So hopefully you all will enjoy this new design and if there are more request of improvements, let me know!

This is the link to the AAA 55+ Battery storage model.