Duracell Quantum Alkaline-manganese dioxide battery. Reliable everyday power. Get dependable, long-lasting power from Quantum batteries with Duralock Power Preserve Technology. These batteries have been engineered to deliver just the right level of power for most of your household needs. Plus, they now have up to a 10-year guarantee in storage. Many of the devices you use in your home are powered most efficiently by Duracell Quantum, including toys, clocks and radios, remote controls, smoke alarms, flashlights, portable electronics, calculators, wireless mice and keyboards. Equipped with more active material than any other alkaline, This will increase your productivity and reduce your operating costs.