These 4 Duracell 357 303 SR44 watch batteries are long-lasting silver oxide coin cell batteries with an expiry date of the longest possible. With a voltage of 1.5V and a capacity of 170mAh, they are suitable for high drain devices and operate within a temperature range of 0°C to +60°C. The batteries come in a pack of 4 units, each with dimensions of 11.6mm diameter and 5.4mm thickness, making them ideal for a variety of applications in the sound and vision industry. Manufactured in Switzerland, these batteries are reliable and efficient for powering your devices for an extended period of time.