The Olight CR123A is a 3V, 1600mAh button top battery ideal for use in high-drain devices like flashlights and cameras. A remarkable 10 year shelf life means these units will be ready to go when needed so you always have a backup. Whatever device you have outfitted with the Olight CR123A will gain the long-lasting power of Lithium Manganese Dioxide chemistry and individual packaging which ensures the battery's freshness.