This 12-pack of Vevor 9V alkaline batteries delivers steady power for smoke detectors, carbon monoxide alarms, meters, flashlights, and other everyday electronics. Designed for long-lasting performance, these single-use batteries help reduce frequent replacements in high-drain devices. The leak-resistant construction supports safe storage and dependable operation. They can be stored in a cool, dry place for up to 10 years of shelf life. Made without mercury, cadmium, or lead, they offer a cleaner power option for home, office, and emergency use.