The Lithium Coin CR2450 batteries have certain accomplishments for applications where traditional batteries cannot be used. Use them for calculators digital watches laser pens car keys medical devices like a clinical thermometer and a tensiometer and fitness appliances. The Panasonic lithium coin CR2450 batteries still have 90% of their original capacity after 10 years. The reason for this is that they are chemically very stable thanks to the combination of lithium and manganese dioxide. Long-term discharge has been verified at all operating temperatures under low-load discharge conditions.