To get the max current, put some load on the secondary until the voltage drops about 5% then read your current. This is not an exact science but it will give an idea. To get a more accurate value it
FizzGIGG, Welcome to this community! Interesting thought, I have no clue but I hope someone can help. I have a couple of dead laptops in my trash bin too. They must have an interface standard of some kind. Ante ::)