A simple box to store 4 spare (rechargable) AA batteries for a digital camera. Designed with OpenSCAD and printed on my repstrap 3D printer in ABS. Some more images can be found on http://www.flickr.com/photos/pasutx/
Print the bottom part and the cap. Add a rubber band and use your imagination. To access the batteries it is not necessary to remove the rubber band, just lift the cap and place it on the side.
The openscad source is provided so you can make variations in the number en size of the batteries.