Q. Which adapter is best for fast charging?

Answer

Spigen PowerArc 40W ArcStation Pro is the best mobile adapter for fast charging. Using just one of the ports it can supply power at a rate of up to 30 watts. An iPhone's battery may go from dead to over half charged in half an hour when using the two USB-C ports simultaneously however it would only reach about 20% charged in the same length of time when using the charger that comes with the iPhone. The PowerArc 40W ArcStation Pro is the best example of a dual USB-C charger which is still quite uncommon.