This wireless computer mouse was created by Japanese design studio Nendo for Elecom. Called Kandenchi, which in Japanese means dry cell battery, the piece lives up to its name. The mouse is the same shape and size as a D battery. Even though it might look ergonomically awkward, it follows human clicking habits precisely. The left-click button is positioned directly under the index finger, if you grip the mouse from the side, the scrolling wheel is positioned under the middle finger, and what looks like the positive terminal is the right-click button.