Gridfinity stackable batterystorage (AAA)

Gridfinity stackable batterystorage (AAA) 2x1 gridfinity box for 21x AAA batteries.(i noticed that some companies have a thicker outlayer on the AAA versions. so the might barely fit in this one. I use mainly Ikea branded and they fit perfectly) boxes are stackable to reduce space. I am creating these to store all my the types of batteries i use arround the house for my smart home. Changes to gridfinity.My own solution was giving problems with stacking. Gridfinity to the rescue