DC-DC Adjustable Boost Converter Step-up Power Module 150W 6A is a very suitable voltage booster/regulator for projects that require high power. The board can boost 10V-32V input voltage to regulated 12V-35V adjustable output voltage. The input current of the board is up to 6A and output current is up to 10A. The board has 100W output power without cooler. With proper cooling the output power can be as high as 150W.
You can charge a 19V 2,5A laptop battery by using DC-DC Adjustable Boost Converter Step-up Power Module 150W 6A by with a 12V battery. The conversion efficiency of the board is 94% with 16V input and 19V 2,5A output.