... . USB OUT 5.DC OUT Voltage:5V,6V,7.5V,9V,12V,14V,16V,19V 6.DC OUT current:4A(constant ... :2A( constant ) ; 2.5A( Max)11.Input Charging Voltage:8~20V 12.Charging Time:About 3h 13.Charging method:1. AC ... accessories:VI. Product clear picture: rechargeable universal battery bank 8~20V/4.5A high capacity for Laptop, netbook, ,DVD,tablet PC ...