Enhance your devices' performance with the reliable Sony 364 SR621SW Silver Oxide LR621 batteries. Ideal for a range of applications, these button cells are crafted to provide long-lasting power to your small electronics. Proudly manufactured in Japan, these batteries reflect the quality and durability that Sony is known for. Each pack contains 20 units, ensuring you have a ready backup when needed. With a stable voltage of 1.55, these silver oxide batteries are designed to maintain consistent power delivery. They come with a good expiration date of 12/2035, offering ample time for usage. Enjoy the convenience of free tracking on your order.