4.5 car battery load voltage checks on used car battery car battery load voltage tester to check. Method: the two clips car battery tester were caught in the car battery 2 pole column (labeled "+" clip connected to car batteries car battery cathode production, marked "-" clip then negative), press the start button requires within five seconds, the car battery tester pointer should stabilize at a certain scale value. 4.6 Check the vent is smooth car battery while charging a car battery, the electrolyte density will increase and cause decomposition of water to produce hydrogen and oxygen, the temperature will rise overall automotive batteries, hydrogen and oxygen to accelerate evaporation car battery, discharged from the vent. If the vent plug, should be clear to prevent hydrogen and oxygen produced in the car did not break out the battery, causing the air pressure increases and the expansion of the electrolyte resulting in damage to the vehicle battery. Currently the car uses a lot of high-tech, its direction is mechatronics. Microelectronics promote the development of more electronic vehicle development to control the direction, making the car safer, more economical, and better handling, the car's performance to a higher level. At the same time, vehicle maintenance and repair work has become both easy and more difficult. Because the car is usually equipped with an electronic self-test system, a system fails, it can automatically alert the driver of the timely repairs, so you can take preventive measures, with special instruments can be quickly detected, and therefore make it easier for maintenance work . On the other hand, it requires maintenance workers must have the appropriate high-tech knowledge, and there are special detection equipment, otherwise it can not start. From this point of view, it is more modern car repair difficult. For traditional automotive electrical parts, the main maintenance batteries, spark plugs, generators and other components. Because batteries are now commonly used lead-acid batteries, sulfuric acid liquid overflow easily, and sulfuric acid is highly corrosive, so be promptly wipe clean, taking care to not touch the eyes and skin. Sulfuric acid contained in the water will evaporate when the top surface of the liquid sulfuric acid near the stereotype, it is necessary to add distilled water. Of course, a lot of cars have adopted a maintenance-free battery, because the whole enclosed in a plastic case, reducing the maintenance workload. Batteries do not long, it will slowly self-discharge, until retirement. Therefore, at regular intervals should start a car, to charge the battery. Another option is to pull the two electrodes on the battery down car battery manufacturer, we should pay attention to unplug from the positive electrode column, minus two electrodes line, first disconnect the negative cable, or remove the negative and car chassis connection. And then pulling the other end with a positive mark. Car battery, car battery, car battery, Wei Li Po provided by Shenzhen Wei Lai Po Battery Limited. Shenzhen Wei Lai Po Battery Co., Ltd. (www.weilipo.com) strong, credible, in Shenzhen, Guangdong battery industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Wei Li Po battery and you hand in hand into the brilliant, for a better future!