The silver oxide watch battery, No.303/357, 1.5-volt is a specialty battery designed for use in small electronic devices such as watches, calculators, and medical instruments. this battery provides a steady 1.5-volt output, suitable for devices requiring consistent power. the package contains 3 batteries. each battery measures 0.25" in length, 1.75" in width, and 3.50" in height. this silver oxide chemistry is intended for low-drain applications where stable voltage is required over time. the battery is classified as non-hazardous material. it is a standard replacement part for devices specifying the No.303/357 size. these batteries are engineered for compatibility with a wide range of small electronics that utilize the No.303/357 standard. the silver oxide composition is chosen for its ability to maintain a flat discharge curve, which is useful for sensitive electronic components found in timepieces and precision instruments. the 1.5-volt rating is standard for these applications, ensuring that the device receives the correct electrical potential for its intended operation. the compact size of these batteries allows them to fit into small battery compartments common in modern personal electronics. this pack of 3 ensures that users have spare batteries available for immediate replacement when needed. the product is categorized under specialty batteries, reflecting its specific use in niche electronic hardware.