We use high quality battery,manufactured by Japanese battery giant to produce the CMOS battery. The battery comes with a standard connector,MOLEX 51021-0200 1.25mm Pitch connector.Please check the polarity of connector on 4th images and the compatibility on the description page Connector:2 pins and 2 wires;Red(+,Posive),Black(-,Negative) The professional anti-static packaging bag provides the safe protection on the battery product. Please refer to the last image Each item is tested before shipping.what you see is what you get.