If you ever consider getting a battery-powered wireless mouse that has an automatic shut-off during periods of unuse? Don't. Mom has one, and it shuts off while your hand is resting on it between clicks. Sometimes it shuts off just because you squished the mousepad up and the mouse didn't like going up a hill. Like I said: Just don't do it. You'll be happier replacing the batteries with Engergizers every so often.