When the vehicle suddenly breaks down, runs out of power, cannot start, cannot find a car repair shop or cannot find tools for maintenance, our emergency power supply will help you a lot. High-rate polymer battery with an actual capacity of 99900mAh, universal for multiple 12V gasoline cars, high-rate battery easy start.Equipped with a USD port, it is convenient to charge mobile phones, laptops, MP4, PMP, GPS, etc. The fast charging port provides the fastest charging speed to save time.The high-performance polymer lithium battery cell can withstand -20 severe cold and -60 high temperature to ensure that the battery stops and starts normally. The thickened and thick battery clip is safe and does not harm the car.Designed with 3 light modes: LED light always on, flashing mode and SOS mode, you can easily cope with a variety of emergencies.Polymer lithium battery; overcharge protection; voltage stabilization protection; constant current protection; short circuit protection;Deep discharge protection; anti-reverse plug protection; temperature protection; magnetic field protection.