This is a AAA Battery Storage Holder that hold 4 AA. while back i was looking for a battery holder for my camera case and was surprised to find that they where are hard to find. So now that i have a 3d printer i thought why not print onePrint a top and bottom. Next you may have to do some clean up work on the top if you find you got any plastic globs inside while printing. Do not sand down the ribs to far or you will find the top will not stay on the bottom by itself.