I am developing a Kinetica OmniHamsterMouse, that uses small coils and weights that function as a little dynamo to charge the battery. It has a (detachable) USB wire as well, so any excess power generated by violent Hamstermouse moves will charge a laptop battery. Additional solarpanels can be placed on top of the mouse, so when your hand is on your keyboard (or somewhere else), the last bit of light in your room is captured to charge the battery ! Inside the HamsterMouse, you can replace the optical sensor module with a HamsterRunningWheel (tm) and actually place a small hamster with GPS in it, so it will act as a sort of powersteering for your crazy mousemoves.. no more RSI ! Of course it comes with sedative pills to keep the hamster from running amok. Modulair hydrogen and -nuclear power units are being developed, so you will no more risk running out of power! If you place orders now, you will receive 2 genuine OldSchoolMice. You know, the ones they used back in 2008. Always works!