The Duracell 9V Battery LR22 Plus Alkaline Batteries are high-quality power sources suitable for a range of devices. With a voltage of 9V and a chemical composition of alkaline, these batteries provide reliable and long-lasting power for both high and low drain devices. Made in Belgium, these batteries are certified as mercury-free and come with a manufacturer warranty for the longest expiry. Ideal for use in smoke alarms and other equipment requiring dependable power sources, the Duracell 9V Battery LR22 Plus Alkaline Batteries are a reliable choice for your power needs.