Catalog > Consumer Electronics > Batteries and Battery Accessories > Alkaline Duracell Battery Battery MN21B1 BATT 12V ALKALINE (GP23A) Discontinued Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Additional Information Model MN21 Electrochemical System Alkaline Nominal Voltage 12V Rechargeable False Usage Remote Controls | Alarms | Home Security Devices