There are all sorts of computer mice out there. Some are in different colors, and some are built to fit to your specific hand size. The Kandenchi designer mouse however, was built after the design and shape of a battery. It sits upright and has very basic mouse functions such as a left and right click, and a wheel.
I would think this new mouse would take some time to get used to, and wouldn’t be very comfortable after long term use. Having to hold up your wrist higher than normal and at a different angle would be a little tough to adjust to, but may be more comfortable over time. If you’re wanting to find out for yourself, they will cost $65 and will be on the market through Elecom in October. But keep in mind that this moues is only compatible with Windows XP/Vista/7 and Mac OS 10.5 and up.