High capacity 4000mAh 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, three-function switch-over, emergency rescue, signaling, lighting, deterrence, defense and other powerful features. It has a safety hammer and blade help you get out of dangerous situation. Five levels of power display indicate battery status, real-time recharging reminders, automatic shut down under no-load condition. over-current protects the device from overload, making it more convenient, safer and more energy-efficient. It is the ideal choice for night shift workers,