The Renata CR1616, batteries are high-quality 3V lithium coin cell buttons designed for a wide range of applications such as toys, watches, hearing aids, and car keys. With a long expiry date of 08/2031, these batteries are reliable for powering low and high drain devices. Made in Switzerland, these batteries have a chemical composition of lithium, offering a consistent voltage output and long-lasting power for various uses. Ideal for everyday devices that require a compact and efficient power source.