Mini AA Dispenser (Comes with Lid + Under 10cm³ )
A smaller version, which can be printed within 10cm³ (the dispenser on it's own, without the lid), the lid is 100% optional, but I'd print it, just for the looks.
Put the batteries inside the dispenser- there is no need to be neat, as long as they are in the right direction. (I wonder how it goes!)
You can put quite a few in there and only like 3 or 4 less than the other dispenser, which still gives room for many batteries.