Lithium Button Cell, CR2025. Supplied = assembled. Voltage = 3 V. Height = 2.5 mm. Width = 20 mm. Battery size = CR2025. Product type = batteries. VARTA lithium button cell batteries are available in the most frequently required battery sizes for all standard applications and smart electronic devices. High capacity for longer runtime. Low internal resistance and self discharge. The high quality VARTA LITHIUM button cells were developed to give small electronic devices a reliable power supply. The batteries deliver the highest output for pulse and continuous discharge applications. All VARTA lithium button cells are packaged in child resistant packaging and meet the highest safety standards. Please note: It is prohibited to dispose of batteries and rechargeable batteries as household waste. They can contain hazardous substances that can harm the environment and your health. At the same time, they also contain important resources such as nickel, iron, zinc or manganese that can be recycled. You are therefore obliged to dispose of these products in the correct manner. After using the batteries and rechargeable batteries, you can either send them back to us or dispose of them free of charge at the nearest collection point (e.g. at official collection points or at retailers) .