... steps output voltage 2,High-current output 4.5A max. 3,High capacity 50Wh laptop battery 4,Universal external battery I ... Li-Polymer 3.Cell Capacity:51Wh(13600~14000mAh) 4.Output port:Two independent output port: 1. ... ,19V 6.DC OUT current:4A(constant );4.5A(Max.)7.OUT DC/DC efficiency:92 ... rechargeable universal battery bank 8~20V/4.5A high capacity for Laptop, netbook, ,DVD,tablet PC, iPhone/iPad/iPod, ...