There are kinetic wrist watches that need no battery. They just have an internal capacitor which is charged by the arm's movements. I have one such watch myself.
My idea is to use the same principle for a wireless computer mouse. We move the mouse around all day long as we work. Those movements could charge the mouse's internal capacitor. This way the mouse would not need batteries! Clean, environmental-friendly energy for our moving pointer device!
How about that?
Reward: This product for free!