Duracell lithium battery are designed for use in all electronic devices, such as (bike computers, postal and bathroom scales, desktop clock radios), security (bank card readers), medical devices (glucose meters, heart rate monitors) and Fitness devices (pedometers) etc. CR2032 and CR2025 batteries have a ring-shaped layer which has a bad taste to discourage swallowing from babies and toddlers. Using Bitrex®, the bitterest substance in the world commonly used in household products to prevent ingestion. The bitter taste layer on the Duracell cell is non-toxic and completely harmless if consumed.