A customizable coin (button) battery holder to power your gadgets that requires no soldering.
See the images:
1/put a wire through one of the back holes, and loop it back out.
2/slide a second wire through the front holes
3/slide in the coin battery to power your device
Edit 5 May 2013: Added the ability to create a rack of the holders, and added a build plate. As example, an stl with 20 holders uploaded