Duracell Quantum-a revolutionary advancement in battery technology. It’s the only battery with Hi-Density Core Technology for unbeatable long-lasting power and Power check for instantly checking your power level at any time. Duralock Power Preserve Technology is guaranteed for 10 years in storage. Quantum batteries are ideal for use in many battery-powered devices, including portable electronics, wireless mice, testing equipment, remote controls, flashlights, calculators, clocks, radios, keyboards and more.