Holding 40% more power than the Duracell Plus AA battery, this Duracell Ultra AA battery is useful for the devices we use regularly that require a high usage of power from a regular sized battery. An example of these devices would be digital cameras, a Bluetooth computer mouse, keyboards and many more. The Duracell Ultra AA battery preserves its power for longer, which means it needs to be replaced less often, which in turn makes it the economical choice when powering those energy draining devices we use regularly.