A photo is captured momentarily in an unplanned moment, so in order to catch those moments a powered up camera is essential. This CR245 battery provides for the camera and the external flash, it is compatible with a steady, reliable source of power. Its durable and powerful energy is typical of the Duracell brand. The Duracell brand has a commendable reputation of consistently manufacturing long lasting batteries with dependable and reliable energy. The CR245 battery has a lengthy shelf life so you can always keep a spare back up battery, knowing that it will retain its energy right until you need it.