This Energizer A23 Battery x 1 S543 (also known as 23A, MN21, or V23GA) have a shelf Life of up to 5 years. They are ideal for devices that require short bursts of high power, such as: Wireless doorbells Remote controls (especially for car alarms and garage doors) Keyless entry systems Bluetooth headsets Security systems Laser pointers They have a reliable performance in extreme temperatures and a leak-resistant design

Trusted brand with consistent quality Long shelf life, making them great for backup storage.