Duracell Procell coin cell batteries are designed for small, professional devices such as security sensors, key fobs, glucometers and other related high-tech sensing devices and monitors;Designed for small, professional devices such as security sensors, key fobs, glucometers and other related high-tech sensing devices and monitors;Lithium lasts considerably longer than alkaline for longer runtime;Don't forget to ask about our lifetime battery replacement services for you watch or keyfob;Recycle with us! Bring your old dead batteries to your local Batteries Plus location for proper disposal. Fees may apply.