DURACELL MN21B4PK 12V 21/23 Alkaline Battery 4-pack

12 V Alkaline 4-Pack

This four-pack of DURACELL MN21 batteries delivers 12 V alkaline power for everyday security and remote devices. Each cell fits the 21/23 size used in car alarm remotes, electronic door locks, garage door openers and motion detectors. The pack supplies four ready-to-install batteries for immediate replacement needs.

Capacity and Headroom

The 12 V output handles typical low-drain security electronics such as remotes, keypads and detectors without voltage sag. Continuous high-current draw will exhaust the alkaline chemistry faster, so devices with frequent transmission cycles may need more frequent changes. The five-year storage guarantee means spares stay reliable until needed.

Build and Connectors

Standard cylindrical 21/23 dimensions ensure a snug fit in existing battery compartments without adapters. Alkaline construction resists leakage better than older carbon-zinc types, protecting sensitive contacts in security hardware. The four-pack format lets you replace every unit in a multi-device setup at once.