First Alert® Direct Wire Smoke Detector with 9-Volt Battery Back-Up - 4304 - Northern Safety Co., Inc.
Energizer MAX 9V Batteries (1 Pack), 9 Volt Alkaline Batteries 522BP - Best Buy
BRK First Alert - FG250B Dual Ionization Smoke Alarm with 9-volt Batte– Wholesale Home
How to Replace 9V Batteries in Smoke or CO Alarms
BudaFireDept on Twitter: "Replace Smoke alarms every 8 to 10 years. Replace the 9 volt batteries twice a year. Install smoke alarms in every sleeping area and hallway. Have a fire escape
Kidde Fire Ionization Smoke Alarm - Zerbee
How to Replace 9V Batteries in Smoke or CO Alarms
BRK CO250B 9 Volt Alkaline Battery Operated Carbon Monoxide Alarm | Independent Electric
Kidde I4618AC firex Hardwire Smoke Alarm - Fire and Safety Plus
These 3 9V batteries are the BEST for smoke detectors & alarms | Battery Products