A:Answer Doozi - You would need to remove the screw located at the bottom of the VTech IS741 Doorbell and then insert a flat-bladed screwdriver between the doorbell and its wall mount cover to pry open at both sides. You can then replace the batteries with new AA batteries. If you have other questions, please contact VTech Customer Support for further assistance at 1-800-595-9511. We are open from 9:00 AM to 3:00 PM, Mondays through Fridays. When calling, please have your model number handy: IS741. Thank you! - VTech Support