Yes, almost all of the AirPower images online show it plugged in so it's very hard to tell what port it is. But I just looked online and here is what AppleInsider says:
"AirPower appears to be connected to its charging puck — wattage unknown — via a single Lightning cable. The pad itself is large enough to comfortably fit an iPhone X, Apple Watch and an AirPods case, but there is little room left for much else.'
- AppleInsider
So it could be lightning actually.