Amazon.com: Synergy Digital Energizer A23 Battery Combo Pack Re-Pack - Pack of 2 12V Mercury-Free Alkaline Batteries Use for Headsets Garage Doors Remote Controls Home Security Systems Car Locking Device & More :
A23 12 Volt Alkaline Battery | 23A 12V Battery
Energizer Specialty A23 Alkaline 23a Security Batteries (2-Pack) in the Device Replacement Batteries department at Lowes.com
A23 Alkaline 12 Volt Battery - Brooklyn Battery Works