What is kandenchi? It’s a wireless computer mouse in the shape of a battery (‘kandenchi’ in Japanese). Designed by nendo, the mouse is 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. 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.