Duracell Quantum AA Alkaline Battery, 2 count per pack -- 56 per case. A revolutionary advancement in battery technology. Combined with a Hi Density Core and PowerCheck, its a Quantum leap in battery power. Based on Hi Density Core and PowerCheck. Only battery with Hi Density Core Technology for unbeatable long lasting power Exclusive PowerCheck feature lets you instantly check the power level, so you can trust it to work when you need it the most Duralock Power Preserve Technology. Guaranteed for 10 years in storage Best uses Quantum batteries are ideal for use in many battery powered devices, including Flashlights Baby swings Smoke detectors Portable electronics Toys Remote controls Calculators Clocks and radios Keyboards and moreDuracell