Rayovac® 123A Photo Batteries, Lithium, 3V, 1/Pack

This battery will keep your device running stronger and longer. It's especially ideal for digital cameras and other notoriously high-power-drain devices. This single Rayovac lithium battery has a much higher energy density than some other models, so it delivers a steady 3V of power. The battery is also mercury-free and very dependable. Dimensions; 3.5" x 5.8" x 3.5".