Juli Clover, writing for MacRumors:
Starting with iOS 11.2, the iPhone 8, iPhone 8 Plus, and iPhone X are able to charge at 7.5 watts using compatible Qi-based wireless charging accessories.
Currently, on iOS 11.1.1, the three devices charge at 5 watts using Qi wireless chargers, but Apple promised that faster speeds would become available in a future update. It appears that update is iOS 11.2.
MacRumors received a tip about the new feature from accessory maker RAVpower this evening, and tested the new charging speeds to confirm. Using the Belkin charger that Apple sells, which does support 7.5W charging speeds, the iPhone X was charged from 46 to 66 percent over the course of thirty minutes.
At 7.5W, it’s still not as fast as the 15W supported by the Qi 1.2 spec on compatible Android devices, but it’s good progress nonetheless. I wonder if Apple’s upcoming AirPower mat will also max out at 7.5W, or support up to 15W wireless charging for multiple devices.