This pack of Energizer 364/363 Cell Watch Batteries SR621SW is a great choice for those in need of reliable power for their watches. The batteries are newly manufactured and come in a sealed single or pack of 5, ensuring that you can use them right away without worrying about expiration dates. The brand Energizer is known for producing high-quality batteries that last for a long time. These coin cell/button batteries have a battery size of 364-621 and are perfect for watches that require this type of battery. Whether you are a watchmaker or simply need to replace your old batteries, these Energizer batteries are a great choice.