The E-Circuit AG4/LR66 Alkaline Button Cell Batteries are a pack of four single-use batteries with a voltage of 1.5V. These coin cell/button batteries are ideal for various consumer electronics and have an expiration date of 07/2025. Made with alkaline chemical composition, these batteries are reliable for powering small devices and have a long shelf life. Manufactured in China, these batteries are a convenient and efficient power source for everyday use.