Duracell High Power Lithium batteries are designed & developed to offer reliable, long-lasting power for your specialty devices such as digital cameras, flashlights, motion detectors, security sensors, thermostats, & much more. They will preserve power & are guaranteed in storage for up to ten years in storage, so you can be confident these batteries will be ready when you need them. Battery Type: Lithium; Battery Size: CR2; for Use With: Digital Cameras; Hands Free Equipment; Voltage: 3 V.