A full range of storage battery lead mould, battery shell, positive plate and negative plate, separator, column connection pole lead plate, battery cover, charging flap, electrolyte, leadCar battery after a long time in the home, father often can't start the car, especially in the winter cold day, car dozen not dozen don't respond, so my father do it yourself for a 12 v battery charger, dad when I was young and like make electronic production, like to study Charger after the best dad let me share this charger to you, he said that in some places might be unreasonable, hope knowledgeable and dad communication, discussed the technology, many thanks! I put my dad's homemade process as experience, because he is layman don't understand, may in some places to write wrong, please forgive me!The most before the first of all, need a 12 v battery charger circuit diagram, dad said it is good to have the figure made, in accordance with the drawings can be clear, convenient to begin production.