... 19V 6.DC OUT current:4A(constant );4.5A(Max.)7.OUT DC/DC efficiency:92~94%8. ... at finally. It will total charged fully after 7~8h byconnected as this diagram.if empty of all ... charging MP3450D ifLaptop’s loading current less than 2±0.2A. The Laptop’s demand power always priority ... rechargeable universal battery bank 8~20V/4.5A high capacity for Laptop, netbook, ,DVD,tablet PC, iPhone/iPad/iPod,mobile phone ...