Duracell® Lithium Coin batteries provide reliable, long-lasting power for your specialty devices. They have up to a 10-year guarantee in storage so you can be confident they will be ready when you need them. Great for security devices, calculators, wearables, glucometers, and many other specialty devices. And you can be assured that they’re batteries you can trust because Duracell is the #1 trusted battery brand (December 2016 Duracell Claim Study).