Duracell batteries are suitable for everyday electronic devices such as alarm clocks, wall clocks, remote controls, and lights. The batteries are available in a variety of types and sizes. The Duracell color code helps you find the right battery size. We always have the right product for your needs. The MN21 battery is a reliable power source for powering everyday devices. Duracell Security batteries are particularly powerful and extremely long-lasting. These batteries are ideal for security systems such as alarm systems, remote controls, key fobs, and measuring devices. Duracell specialty alkaline batteries LR23 guarantee lasting performance. Unused and packaged batteries remain fresh and charged for up to 5 years.