The Logitech V450 Nano Laser Cordless Mouse for Notebooks is the high performance answer for those already concerned with portability as a notebook computer owner. The Logitech V450 Nano Laser Cordless Mouse for Notebooks has a good balance between size, portability, ease of use, and responsiveness. The battery life is fairly extensive due to its use of two AA batteries, and provides many days worth of use without the need for battery replacement.