Amazon.com: Duracell 12 Volt Alkaline Alarm Remote Battery MN21 / A23 2 Pack(Counts 1) : Health & Household
Duracell Specialty Alkaline MN21 Battery 12V, pack of 2 (A23 / 23A / V23GA / LRV08 / 8LR932) designed for use in remote controls, wireless doorbells and security systems : Amazon.co.uk: Electronics & Photo