In fact, under the premise of safety, it is necessary to equip with a fire extinguisher. Now many cars have modified many electrical facilities, such as headlights, ventilated seats, electric heating seats, high-power spotlights and so on. , increasing the load of the original car wires and increasing the safety hazards. Even if the small fire extinguisher on board has limited fire extinguishing ability, it can delay the fire and reduce the fire loss before the firefighters arrive.