The trick with my Lenovo 300W notebook in the airplanes is as following. At first, with the adapter disconnected from the notebook, I charge the capacitors ins

The trick with my Lenovo 300W notebook in the airplanes is as following. At first, with the adapter disconnected from the notebook, I charge the capacitors inside of the adapter by connecting and re-connecting repeatedly (1-2 seconds intervals). The first 5 times the breaker trips, but eventually the capacitors are charged, so no initial high current is drawn from the socket, and the breaker is happy. Only then I connect the notebook to the adapter. I never tried to draw too much power from the airplane socket by playing GPU/CPU intensive games. Wish you productive flights!