Currently, most LED trailers in the world use an external power supply or install a separate generator to power the LED screen: the former external power supply mode may encounter difficulties in finding a power source during outdoor promotion activities. The supply point is embarrassing, and the latter uses the generator power supply mode, which not only consumes a lot of gasoline and increases the cost of use, but also makes noise during the use of the generator. It will interfere with the sound effects of the advertising video. Our JCT Battery Power Billboard Trailer (E-F8NE) is equipped with a 51.2V300AH high-quality battery pack, which can last for 30 hours on a full charge. It greatly improves the convenience of ground promotion activities and does not require complicated power connections. There is no need for customers to choose the voltage and power, and wide-voltage charging makes it as convenient for customers as using a smartphone! At the same time, new energy batteries are safe, efficient, environmentally friendly and energy-saving, which reduce the usage costs meanwhile bring higher profits.