Duracell Alkaline Power Plus Batteries 9V Pack 4

Duracell's Duralock Power Preserve Technology provides long lasting power that isn't lost in storage, meaning it is ready whenever you need it most. Duralock is a unique power preservation system that helps lock in power so your battery is guaranteed to stay powered for up to 10 years in storage. Features: 100% Tested for Voltage & Leakage; 10 Year Power Guarantee in Storage.