High capacity 16800mAh with high power polymer battery is adopted for fast charging. It can support an emergency jump start and entirely replace the included battery for a car startup. It also supports general cellular phones/laptops charging and completely replaces products similar to mobile power banks. With true powerful flashlight , four-function switch-over, emergency rescue, signaling , lighting, deterrence, defense and other powerful features. It is the ideal choice for night shift workers, overtime workers and many others.LCD display indicate battery status, real-time recharging reminders, automatic shutdown under no-load condition. Over-current protects the device from overload, making it more convenient, safer and more energy-efficient.