The Renata 319 SR527SW is a high-performance silver oxide button cell battery, engineered to deliver stable and long-lasting power for compact, low-drain devices. With a nominal voltage of 1.55V and a capacity of 21mAh, it is ideal for analog watches, small medical instruments, and precision electronics. Manufactured in Switzerland, this original Renata battery is known for its leak-proof construction, excellent reliability, and long shelf life, ensuring consistent performance over time.