CopperTop all-purpose alkaline batteries are not only dependable they're also long-lasting. You can take comfort in a 10-year guarantee in storage. They're great for many of the devices you use daily. From storm season to medical needs to the holidays you know it's a battery you can trust. Use AA CopperTop batteries for smoke alarms flashlights lanterns calculators pagers door locks cameras recorders radios CD players medical equipment toys and electronic games.