A stackable battery box. Easy to print, versatile use:

• No support needed when printing
• Loose fit - even if print is inaccurate, the batteries won't be stuck in the slot
• For AA and AAA batteries, both box types can be stacked back to back
• stacked boxes won't slip because of recess on bottom of the box
• separate connector part allows mounting the boxes together horizontally
• notches to allow use of a rubber band: tie 2 boxes together and use them as a secure transport box