This battery tester from Clarke has been designed to simply clip onto any 6 or 12V lead acid battery, even in situ, to obtain an immediate report on charge status and condition. Establish straight away whether or not a replacement is due. Particularly useful for maintenance of cars, commercial hire fleets and other motor industries. Integral carry handle & clamp holders. Easy to read colour coded results dial. Safe & simple to use with no sparking. Heavy duty insulated leads & terminal connectors. Strong steel construction with well ventilated solid state circuitry.