=>dc20v/dc12v/usb5v outputs:all-in-1 fast charge battery pack.it features with 1*dc20v/5a for laptops(18.5v~20.5v), 1*dc12v/2.5a for cameras,routers,led lights, 2*usb 5v/2.1a and 2*usb 5v/1a for smart phones, ipad, tablet &other usb-charged devices. you can charge several devices simultaneously to save you much time. ultra energy saving & fast charging speed with dc input:16.8v/2.5a, our k2 battery pack can be recharged in just 6-8 hours.

=> once fully charged, k2 portable battery pack can charge laptops(65w) about 2.5 times and smartphone about 11-18time.