The Duracell CR2450 lithium battery is the perfect replacement battery for your watch or key fob;It is also great for glucometers, calculators and more;This 2450 battery's compact design is ideal for many small and flat devices; Easily slides into place when it's being installed;With Duracell's Duralock Technology this battery lasts up to 10 years in storage;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.