badBrick - (3) 9 Volt Battery Case and top for Arduino UNO R3.

thingiverse

This case accommodates three 9-volt batteries, wired in parallel to power an Arduino UNO R3. It comes with two lids; one standard top and another for holding the UNO R3. The case can be used on its own or mounted using Lego round shafts from technic kits through four holes. If you lack a 3D printer, visit www.badbrick.com/catalog for printing services. Your purchased case will arrive fully wired and ready for 9V batteries. For printing with a MakerWare, adjust the "Medium" settings: Layer Height at 0.2 and increase temperature to 240C for better fusion of prints. All other defaults remain unchanged.