... OUT 2. USB OUT 5.DC OUT Voltage:5V,6V,7.5V,9V,12V,14V,16V,19V 6.DC OUT current ... :4A(constant );4.5A(Max.)7.OUT DC/DC efficiency:92~94%8.DC OUT capacity ... charged fully at finally. It will total charged fully after 7~8h byconnected as this diagram.if empty of all battery ... 8~20V/4.5A high capacity for Laptop, netbook, ,DVD,tablet PC, iPhone/iPad/iPod,mobile phone