Duracell MN21 batteries are used extensively in security keyfobs, alarm system components such as wireless PIRs, motion detectors, shock detectors and magnetic reed switches.

The MN21 battery fits the majority of car alarm keyfobs and is also used in keyless entry systems.

Individual Battery Details (23A Alkaline Battery)
Battery Capacity: 38.0mAh
Battery Technology: Alkaline (Single Use)
Diameter: 10.0mm
Height: 28.0mm
Voltage: 12.00V
Weight: 6.0g
Replaces: 23A, 23GA, A23, E23A, GP-23A, GP23A, K23A, L1028, LR23A, LRV08, LRVO8, MN21, MS21, V23, V23GA, VR22