This is an updated review. I originally gave this P/S 4 stars but after a few weeks of use I found that it gets very hot and turns under load It charged my Surface Pro 2017 fine when it was off, but whenever I tried to charge it while it was on and working, it got very hot and stopped charging, after it had cooled for a while it worked it until it burned hot again.I sent it back for a refund and ordered a genuine Microsoft charger.