A:AnswerBoth laser and optical mice technically shine a light off a surface and measure the reflection in order to provide precision tracking. An optical mouse usually uses an infrared LED (sometimes photodiodes), while a laser mouse uses, you guessed it, a laser to illuminate a surface.
A:AnswerCheck toe contacts inside the mouse to see if there was any battery leakage. Even invisible film from battery leakage can cut off the connection. Use a pencil eraser to clean them off. Double check with another set of batteries - they can be defective out of the package.
