​The car jump starter is a portable multi-functional power supply device mainly used for car starting in emergency situations. Its main areas of application include vehicle starting, not only for cars but also for vehicles such as motorcycles and tractors. The jump starter also plays an important role in outdoor activities, equipped with a built-in LED flashlight to provide portable lighting at night or outdoors. Its USB ports allow for charging mobile devices such as smartphones and tablets, while some models also offer additional power sockets for connecting small electronic devices. Advanced models may come with a built-in air compressor that can be used to inflate the tires, ensuring the vehicle has proper tire pressure when needed. In an environment far away from the power supply, jumper starters can also be used to provide emergency power to ensure the normal operation of electronic equipment. This is an easy-to-use tool that provides users with a convenient and safe solution. It is not only suitable for vehicle maintenance, but also plays an important role in various emergency scenarios.