Duracell CopperTop all-purpose alkaline batteries are not only dependable they re also long-lasting. You can take comfort in a 10-year guarantee (five-year guarantee for 9V) in storage. They re great for many of the devices you use on a daily basis. From storm season to medical needs to the holidays Duracell is the battery you can trust. Battery Type: Alkaline; Battery Size: AAA; For Use With: Everyday Electronic Devices; Voltage: 1.5 V.