Electric E-bike Scooter Charging Dc Port 5.5x2.1mm. DC 5.5 × 2.1mm charging port socket. Product Type: DC Charging Port Socket. 1 × DC 5.5 × 2.1mm Charging Port Socket. Colour: As shown. Suitable for compatible devices using aDC 5.5 × 2.1mm charging connector, including selected.