Duracell Quantum Alkaline batteries give you a one-of-a-kind Quantum Leap in Power with a Hi-Density Core™ technology. The exclusive PowerCheck™ feature allows you to instantly check the power level so you can trust them to work when you need them the most. Count on these batteries in devices such as flashlights, remote control toys, video game controllers and more. Plus, you get a 10-year guarantee (5-year guarantee for 9V) in storage for a battery that gives you peace of mind and long lasting power. Battery Type: Alkaline; Battery Size: 9V; For Use With: Everyday Electronic Devices; Voltage: 9 V.