The Renata Battery CR2430 is a fine quality lithium battery. These are small button sized cells designed to power handheld digital devices. The cells are made using finest quality lithium and are great for storage. The cells are designed in a way that their life is not impacted even when they are kept in storage for a long time. The batteries are 3 V, which is supported by devices like watches, calculators, digital meters, medical equipment like glucometer and heart rate monitor etc.