In the event of too-low battery level and urgent need for fast charging, the user can make an appointment for the on-the-spot charging service through the Laidianla App. After the successful appointment, the system will arrange automatic delivery. The order confirmation and delivery status can be tracked in real time, and the charging process is clearly visible in the App. When the vehicle-mounted mobile charging station arrives at the user-designated venue at the appointed time, the staff immediately charges the user's vehicle at the allowed parking section or parking lot. Without worry about finding a charging place, the user can save time and cost and avoid the trouble of waiting in line for public charging piles.