DURACELL Coppertop 9V alkaline batteries deliver dependable, long-lasting power to your essential household devices. Engineered for reliability, this 4-pack is ideal for powering items such as smoke detectors, remote controls, toys, and calculators. Featuring Duralock Power Preserve Technology, these batteries are guaranteed to hold a charge for up to 5 years in storage, ensuring they are ready when you need them most. As the #1 trusted battery brand, Duracell provides the performance you can count on.