I have batteries of just rolling around in a couple of drawers at home and twice in the past few weeks, I have grabbed one, installed it in a remote, and realized it was dead. I decided to make an organizer for the most common batteries that we use at home to make sure I could always lay my hands on a fresh one (a used battery bucket is on my shopping list as well). This one holds 9 AA, 8 AAA, 2 9V, 6 CR2032, and 357 button batteries. Printed out the prototype and it worked and fit great. It is a long and skinny print, so use corner pads to minimize lifting.