Duracell Specialty Alkaline batteries are designed to provide reliable power to specialty devices like car alarms, key fobs, GPS trackers, remote controls, and other electronics. They are guaranteed against defects in material and workmanship, so you can be confident these batteries will be ready when you need them. From storm season to the holidays, Duracell is the number one trusted battery brand. Battery Type: Alkaline; Battery Size: 21/23; For Use With: Everyday Electronic Devices; Voltage: 12 V.