GENUINE 10 X DURACELL MN21 A23 12V ALKALINE BATTERY 23A K23A E23A V23GA IN BOX 5000394102101 | eBay
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