With our review of the G903, we brought you into the world of Lightspeed wireless technology. It is where Logitech developed a wireless system that not only offers the same or better latency than wired devices, no matter the type of batteries used, the longevity of the time it can be used in one sitting has increased as well. Take that technology to the next step though, where you want to run as long as possible, and even though it requires a rethink of mice in general and the systems to make it all happen, Logitech went to the table to do just that.