The CR2016 3V Lithium Coin Battery is a powerful battery that provides long-lasting and reliable power. It is perfect for frequent use in car key remotes, medical devices, digital watches, fitness devices, and other electronics. It has a long shelf life meaning the battery still has lots of percentage of the original capacity, even after 10 years in storage allowing them to be stored for future use. The reason for this is that they are chemically very stable, due to the combination of lithium and manganese dioxide. voltage of 3V and an ultra-compact design. This means that a single lithium battery can replace two, or more traditional batteries. Also, the very small devices can thereby be provided with a powerful source of energy