Duracell High Power Lithium 123 batteries are made with high-purity lithium with up to 40% more power (vs. IEC standard test minimum average duration for CR17345 size. Results may vary by device and usage patterns) for your smart home devices (sensors, keyless locks, smoke detectors), photo flash, flashlights, bike accessories and electronic dog collars. They have up to 10 years of in-storage guarantee so you can be confident these lithium batteries will be ready when you need them.