The Sealey emergency jumpstarter is built with a composite case with integral battery clip storage and carry handle for added convenience. This model is fitted with a 12V power socket that will accept any 12V device with a vehicle accessory socket plug, and two batteries connected in parallel to give high peak and cranking currents. This unit also features a test button to check battery condition and a low voltage switch for use when on 24V system recharge Completing this jump starter is a robust build and a 230V mains charger.