Reverse connection protection,Overheat protection Low voltage protection, Short circuit protection,Over current protection Compact, lightweight and portable, easy to carry and use, especially in limited space The car stopped for too long and no electricity;Battery aging Suitable for: The weather is cold and the voltage is low;The car stopped for too long and no electricity;Battery aging. Protect Function:Reverse connection protection,Overheat protection, Low voltage protection, Short circuit protection,Overcurrent protection Compact, lightweight and portable, easy to carry and use, especially in limited space. Charging status LED indicator. Shorter charging time due to optimized charging process