The Genius NX-ECO is a 2.4GHz wireless mouse that doesn’t have a “battery” inside. At least not the typical type of battery that we’re all familiar with. It has a built-in gold capacitor which fully recharges in just three minutes using the included micro USB charging cable. The cable stores inside the mouse when not in use and the capacitor can be recharged approximately 100,000 times. The mouse also features an adjustable DPI (800/1600 dpi). My only question which I can’t seem to find an answer for is how long does the mouse work per charge… The NX-ECO battery-free wireless notebook mouse will be available for the suggested retail price of US$39.99. It’s currently available through Amazon for $36.38.