Xinlida button battery is really environmentally friendly battery, it has no mercury battery and no mercury and no lead. It is pollution-free and harmful to the environment and human body, and does not need centralized recycling. The most common models are ag3.ag10.ag13. Calculator, counter, scale LED products supporting the use. Storage time up to 2 years, but pay attention to the storage location and temperature, so as not to cause the battery surface oxidation.