Steps are as follows.
1, first look at the electric vehicle's power display needle, to the vehicle at rest, the electric vehicle's power is displayed by the electric meter.
2. After opening, the pointer points to H, indicating that the battery is full.
3. With the riding, the pointer gradually moves slowly in the L direction, indicating that the power is gradually decreasing.
4, the pointer to a quarter of the deviation L will be charged in time.
The No. 9 electric car towel control battery can be charged by plugging it into a socket and connecting it with a wire