Yes, once the key is removed it is just a matter prying it apart from between the two ears that stick up from the center. A fairly thick flat-bladed screw driver will do it (i used the handle end of a tweezer that was handy). This takes a CR2032 battery, (3) volt, very commonly found. There are two little tabs holding it in, plus (+) side up. Just snap it all back together. Voila.