The Energizer 357 1.55 V battery is a single-use coin/button cell designed for consumer electronics. With a voltage of 1.55 V, this battery is suitable for various devices that require reliable power sources. Manufactured in the United States, this product comes in a pack of three, ensuring that you have an ample supply for your devices. The California Prop 65 Warning suggests that the battery should be kept away from children to avoid any potential health risks.