LITHIUM BATTERY EMERGENCY JUMP STARTER

The present invention discloses a lithium battery emergency jump starter, comprising a rechargeable lithium battery and a relay controller with a magnetization function. The lithium battery controls output through a switch of a relay with the magnetization function driven by the controller; and when positive and negative poles of the lithium battery emergency jump starter are correctly connected to an automobile, large current can be outputted, and a magnetic field after large current is generated can be optimized for demagnetization. The present invention uses the relay controller with the magnetization function, and a magnetic field after large current is generated can be optimized for demagnetization. A USB socket has automatic insertion and detection functions, and also has circuit design to achieve the functions of zero consumption current, lithium battery bulge detection, three-level temperature detection and protection, etc. to form effective feedback and coping mechanisms.