History of electric cars than we are now the most common internal combustion engine driven vehicles to early. Father of Hungarian inventor DC, engineer A Niushi · abyad Lick ányos Jedlik earliest in 1828 in laboratory tests the mobile device electromagnetic rotation. American Thomas Davenport Thomas Davenport produced the first car driven by a DC motor electric car in 1834. In 1837, Thomas has received the first patent US motor industry. Between 1832 to 1838, Scotsman Robert Anderson Robert Anderson invented the electric drive of the carriage, which is a primary battery can not be charged to use the drive vehicles. 1838 Scotsman Robert Davidson Robert Davidson invented the electric drive train. Today, still traveling on the road tram is patent in 1840 appeared in the UK. Electric car battery problem summary soften repair: for example 20Ah electric motorcycle battery, 10.5V 10A discharge following one hour, and then travel up to 5A current charge electric tricycle, and gradually reduce the current charge to 15V after. Battery fever is a normal phenomenon. Quickly determine battery problems: 1, see. Appearance: filling drums, leak, the date of manufacture. Drum filling water, lack of acid leaks, put a long time will cure. 2, asked. Electric tricycle motor power companies, the strength of riding, charging habits. Motor power softening, riding electric tricycle brand is softening, not easy to cure timely charge. 3, measuring. Off the grid, short plate aging. Electric tricycle manufacturers, White Dragon machinery (certified), electric tricycle provided by White Dragon Machinery Co., Ltd. Shandong. White Dragon Shandong Machinery Co., Ltd. (www.bailonggrp.com) Shandong Linyi, bicycles, tricycles and accessories leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In the White Dragon machinery leadership with the staff warmly welcome all inquiries negotiations to create a better future for White Dragon machinery.