Renata Lithium 3v CR2032 Button Battery A button battery is a small battery with a button-shaped metal top that can be used in calculators, watches, and other small electronic devices. Renata CR2032 Lithium 3v Button Battery is a great replacement for your old battery. These batteries are small and easy to carry with you in your pocket or purse. They are safe to use and the metal top prevents them from shorting out. The Renata CR2032 Lithium 3v Button Battery is a great replacement for your old battery. Renata Lithium 3v CR2032 Renata Lithium 3v CR2032 is a brand of battery that is known for its reliability and high quality. The lithium battery can be used in devices such as watches, calculators, cameras, or medical equipment. It has a 3-volt output, making it perfect for small electronics. The battery is also available in a 2-pack, so you can always have a spare battery on hand. The battery is also highly durable and has a long shelf life.