This is a cr1-3n battery, which is a 3V Lithium Battery. The 3 Volt Lithium battery is used in cameras, toys, pet containment systems, and any personal electronics that use CR1-3N lithium batteries. This battery has a long shelf life--where it retains 90% of original service life capacity after up to 7 years in storage. The cr1 3n Lithium photo battery is specifically designed to provide a rel