This is a battery holder for AA batteries. It comes with a base storage unit and a downward extension which snaps in to place so you safely can stack several units on top of each other when one battery holder is full. The whole unit can be printed without supports, I use PLA to print it.

There is also a little brother to this model for AAA batteries, you can find it here:

[https://makerworld.com/en/models/2099454-battery-holder-aaa-stackable#profileId-2270306](https://makerworld.com/en/models/2099454-battery-holder-aaa-stackable#profileId-2270306)