Duracell lithium High Power 123 batteries are made with high-purity lithium and offer up to 40% more power. They are ideal for use in smart home devices such as sensors, keyless locks, and smoke detectors, as well as camera flashes, flashlights, bike accessories, and electronic dog collars. These batteries offer a warranty of up to 10 years of storage with Duralock Power Preserve technology, so you can be confident they will be ready when you need them.