Lead-acid batteries, invented in 1859 by French physicist Gaston Plante, are the oldest type of rechargeable battery. Despite having the second lowest energy-to-weight ratio (next to the nickel-iron battery) and a correspondingly low energy-to-volume ratio, their ability to supply high surge currents means that the cells maintain a relatively large power-to-weight ratio. These features, along with their low cost, make them attractive for use in cars to provide the high current required by automobile starter motors. <br/>Meanwhile millions batteries damaging every day, millions dollars wasting every hours, milions pollution hanppenning every second. Because normal work life of a lead acid battery only 2 years[300~500times deep cycle charging]. The 1 AAA battery can pollute 1 square meter earth! How can we do? Accumulator recondition instrument / Battery repair equipment befallen on the world, it's not only can help our human being reduce the pollution and cost, but also can give you a way to feed your family, a chance to come true your future dream. Our job is design more intelligent maintain tools of lead acid battery year by year. <br/>We hope to establish a good relationship with those people whom want to do battery fixing services. It's our both honour to have a chance do this great kind job called environment protect project. For our next generation, next next and next generation, for continued being.