A wireless computer mouse in the shape of a battery - 'kandenchi' in Japanese-, based on the mouse’s own rechargeable nature. The positive terminal has turned into the left-click button, and the scrolling wheel and right-click button are on the side.

This design increases portability and allows for vertical use, making the mouse easy to use on planes, trains and other places with limited workspace. A detachable mini-USB cable lets users plug the mouse into a mobile phone or other electronic device for recharging, just like an ordinary battery.