Composite case with integral battery clip storage and carry handle. Twin batteries, connected in either parallel or series to suit the output voltage, give high peak and cranking currents. Fitted with low voltage switch for use when on 24V system recharge, connecting unit to battery producing less than 1V. LED Battery condition indicators. Test button gives indication of battery condition. Fitted with 12V power socket that will accept any 12V device with a vehicle accessory socket plug. Supplied with mains charger and double plug cable for in-car charging.