Roost has created a smart battery that connects to your WiFi, immediately letting you know there is a problem. The battery fits inside a 9 volt smoke or carbon monoxide alarm. Plus, Roost batteries last up to five years, and their free app alerts you when your battery is getting low. You can also invite neighbors and family members to be monitors — increases the likelihood that someone will be able to take action in the case of an emergency. On Designing Spaces, we’ll show you how easy it is to install – giving you peace of mind without breaking the bank.