The range extender is a gasoline generator. The electricity it generates can be directly supplied to the drive motor to drive forward, and the extra electricity can be stored in the battery. The car equipped with the range extender or the electric car can go as far as you want, and you no longer have to worry about the car running out of power. You can charge while driving. As long as there is oil in the tank, you can extend the range infinitely. The machine is easy to install. Just fix the range extender on the car and connect the positive and negative poles of the battery. The range extender has very low fuel consumption, which is equivalent to the fuel consumption of an ordinary motorcycle, and consumes about 0.2 yuan per kilometer. It uses electricity when there is electricity and oil when there is no electricity, which is very economical.