Designed to provide reliable and lasting performance for both high and low drain devices. Batteries come with proven durability and quality. Improved anti-corrosion components and revised composition resulting in anti-leakage long shelf life. Heavy-duty alkaline batteries ensure long use and get the job done. Heavy-duty batteries are highly used in clocks, flashlights, garage door openers, remote controls, boom boxes, calculators as well as in other high drain devices.