Hello

My laptop charger use

DC19V 3.94

Is there problem if I use charger with DC19V 4.74A

You need to use the proper input otherwise the higher voltage could short out your system. Is this really worth it to you to use the wrong charger? Do you want to end up buying another laptop?

Voltages are the same. The second charger is a heavy duty one with higher amperage. Unless it gets too hot it shouldn't be a problem.