Hii guys, I am using the Dell wireless mouse from the past 5 months.The mouse is working very better. I haven’t yet changes the battery of the mouse.The mouse is easy to use you can place it where you are comfortable.It uses optical light which provides better pointing than old balls.The mouse is dropped by 2 or 3 times but it has no effect still.However It has more price than its value.But Dell is a world wide famous company. In India Dell has the service center in every little or big city.They provides very nice service and support.They will reply you as soon as they can.