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THE POWER OF CORDLESS MICE Maximizing Battery Life in Cordless MouseMan Optical Logitech Cordless MouseMan Optical has been engineered so that the software and the hardware maximize battery life in every possible way. To simplify, our cordless products spend their time switching between sleep and active modes. The challenge is to spend as little time as possible in power thirsty run modes while preserving response time. The engineers have worked for over a year to maximize battery life with no effect to performance. This mouse works better than a corded mouse in accuracy, precision and responsiveness. Cordless MouseMan Optical has four modes that you can see by observing the red LED: Bright Glow Strobe Flash Mouse is in full run mode. LED is flashed 1500 times a second. Mouse is continuously on but dimmer. LED is flashed 100 times a second. Mouse is in sleep mode. LED is flashed 10 times per second. Mouse is at lowest response level. LED is flashed twice every second. Whenever the user moves the mouse or clicks a mouse button, the mouse instantaneously returns to full run mode. There is no latency and the mouse keeps full memory of cursor location. Battery Technologies Currently Available Power Source Pros Regular Disposable Batteries (Alkalines) AA batteries are readily available and can be easily purchased. The low-battery detection system and the power-saving mode of Cordless MouseMan Optical have been designed to maximize battery life. 1 of 3 Cons Disposable batteries are not considered environmentally friendly in Europe as they will need to be replaced on a regular basis. Over the course of a year, a person will most likely buy 4 sets of batteries. Battery Technologies con’t. NiCd (Nickel cadmium) Rechargeable Batteries Cost effective over multiple replacements of alkaline batteries. This older technology is currently used in devices like inexpensive cordless phones. The oldest technology that provides the least amount of satisfaction. Batteries have low capacity and require that products are completely rundown prior to recharging. There is a condition called memory effect that occurs when batteries are recharged prior to being rundown completely--the battery takes on a new memory level and requires recharging sooner. These are becoming obsolete as most manufacturers are divesting. NiCd will be banned by the European Union in a few years because of the heavy metal they contain. NiMH (Nickel metal-hydride) Rechargeable Batteries This is a mature technology with higher capacity than NiCd rechargeables. Unlike NiCd, there is virtually no memory effect. These batteries are environmentally friendlier and used in most contemporary devices. Premium Disposable Batteries (lithium,etc.) When used in high-power devices such as radios, handheld televisions and cameras, there is an advantage. These batteries are for products with higher voltage and higher drain rates. Lilon Rechargeable Batteries A powerful alternative used in devices like laptops and cell phones. Cost is more than NiCd rechargeables. A user will need to be able to recharge when not using the mouse, or to have more than one set of rechargeable batteries. Low-power devices, such as mice, get minimal benefit at a prohibitive cost. This technology is touchy and requires safety features to prevent explosions. Not costeffective for sub-$100 products. Disposable batteries remain, at this time, the best power solution for Logitech Cordless mice, including the Cordless MouseMan Optical. 2 of 3 Conclusion Given the 3 month lifecycle of alkaline batteries, they are the best option for Cordless MouseMan Optical. Users can put batteries in the mouse and forget about them for months. This is a better solution than waiting until the mouse runs of power and having to wait for a recharged mouse before resuming use of the PC. Logitech spent one year creating a new product that is consumer friendly yet technologically advanced. The low battery detection system will provide a generous amount of warning time prior to battery replacement, which will not need to happen for almost 3 months. Competitive optical cordless products are more like cordless phones that require being charged in their cradle and are not functional during the process. These competitive products will need to be recharged while NOT being used, thus preventing a person from using their PC for 4 hours unless they plug in a backup mouse. Additionally, Logitech has chosen to use AA rather than AAA batteries. There is twice as much power in an AA battery versus an AAA battery (1 AA battery is equal to 2 AAA batteries). This simple choice of battery voltage means that the user has more power and longer battery life. At this time Logitech has decided not to use rechargeable batteries for the reasons mentioned above. The cost of a recharger and four cells (so that a spare set is available and the disabling issue resolved) is equivalent to a year's supply of disposable batteries. Previous cordless research has indicated that 3 months of battery life is satisfactory for consumers, however, users can utilize rechargeable batteries if they choose. Summary Points - Disposable alkaline batteries allow for the longest period of uninterrupted use of the mouse - The custom Logitech optical sensor has been optimized to ensure reduced power consumption and extend battery life - For those who wish, rechargeable batteries can be used in Cordless MouseMan Optical 3 of 3