12v Alkaline Remote Battery for gate remotes, garage door remotes and alarm remotes. Commonly used by Centurion Systems , ET Systems, D.A.C.E, Digidoor, Sherlotronics, Gemini, Sentry, Griffon, Qtron, Bartronic, Mami and many others. Should your remote range be shorter than normal or the LED (Light) dimmer than normal the battery is low and needs replacement. The batteries typically have a Manganese Dioxide chemical system and once used should be disposed in a responsible manner. Never store multiple batteries together without packaging protecting the terminals. Should you remote oxidize on the terminals, clean the affected terminal with a small amount of terminal cleaner and protect by rubbing a small amount of petroleum jelly on the terminal before replacing the battery.