Super fresh genuine GP 27A alkaline 12v batteries, Works for: Laser Pointer Insulin Pumps, Heart Rate Monitor, toys ,Watches, Cameras, Calculators, Car Security Alarm, Keyless Car Remotes, Organizers, Computer Equipment (memory backup battery) CMOS, and all other devices that requires this battery size Equivalent to: 23-279, 27A, A27, A27BP, A27S, AG27, B-1, CA22, EL-812, EL812, G27A, GP27A, L828, MN27, R27A Best use before date 2021