Duracell Coin Button batteries are made with high purity lithium for reliable, long-lasting power for your specialty devices. With Duralock Power Preserve Technology it’ll preserve power in storage, guaranteed, so you can be confident these coin button batteries will be ready when you need them. To help ensure the safety of your children they have been designed with child resistant packaging. They’re great for devices like glucometers and calculators as well as watches and car remotes. And you can be assured it’s a battery you can trust since Duracell is the #1 trusted brand of pharmacists and medical & office professionals.