Mighty Max Battery 12V 4.5Ah Home Alarm Security System SLA Battery Rechargeable Sealed Lead Acid 1250 Backup Power Batteries in the Device Replacement Batteries department at Lowes.com
Kidde i9010 Sealed Lithium Battery Power Smoke Alarm
Firex i5000 Hardwire Ionization Smoke Alarm with Alkaline Battery Backup by KiddeShop Smoke Alarms, Carbon Monoxide Detectors, Combo Alarms, Fire Extinguishers - By Kidde