These 123A photo lithium batteries provide excellent performance and value for specialty devices. They provide dependable power for camera equipment, so you'll never miss that perfect shot and are also recommended for flashlights, home security systems, hunting accessories and more. They hold power up to 10 years in storage. Rayovac® Battery, Photo Specialty Cell, Lithium Manganese Dioxide (Li/MnO2), 3 V Nominal, 1400 mAh Nominal Capacity, 123A, 2 VDC Discharge Cut-Off, 100 Ohm Internal, Raised Positive/Flat Negative Terminal, Plastic Case, 10 years Shelf Life, 17 mm Dia x 34.5 mm H