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Engineered with Duralock Power Preserve™ technology, DURACELL's CopperTop 9V batteries are guaranteed to last up to 5 years in storage. They fit many household devices and can actually cause them to operate more efficiently. Uses include toys, remote controls, flashlights, calculators, clocks, radios, smoke alarms, portable electronics, and wireless computer accessories. FEATURES 2-pack of 9V alkaline batteries For all-purpose use Duralock Power Preserve™ technology offers an extended lifespan Guaranteed for up to 5 years in storage Ideal for toys, remote controls, flashlights, calculators, clocks, radios, smoke alarms, portable electronics, and wireless computer accessories