The CR123A or CR123 is a Lithium photo battery and is most often used in 35mm and APS cameras.
The CR123A battery operates at 3V and a most common capacity of 1300mAh. The CR123A battery is also known as a CR123, DL123A, ELCR123AP, K123LA, CR123R and CR17345.
Suitable for use in cameras, electronic equipment
Also suitable for memory back–up applications