This is a 25 pack of Sony 3V Lithium Coin Cell Batteries with integrated connectors. The part number is CR2450S. Lithium coin cell bateries like these are used in watches, cameras, and computer memory applications. These batteries were originally bulk packaged for OEM distribution and we have re-packaged them for sale in packages of 25. They are being sold as pictured and do not include any additional parts or accessories.