https://wccftech.com/ios-11-2-fast-wireless-charging-speed-comparison-with-wired-charging-on-iphone-8/

While smartphone manufacturers have adopted the fast charging technology for a long time, Apple remained resistant to it until the iPhone 8. We have previously reported that the company will enable the 7.5W fast charging on the iPhone 8, 8 Plus and the iPhone X with its forthcoming iOS 11.2 update. At this point in time, the feature is already enabled in iOS 11.2 beta 2 which dropped earlier this month. Now a test has been conducted by Birchtree that shows a comparison between the standard wired charging and iOS 11.2 fast wireless charging on the iPhone 8. So let’s check out the comparison in a bit more detail.

If you’ve got the iPhone 8 or the iPhone X, you might have noticed that it ships with support for 5W Qi wireless charging. This means that a jump to 7.5W is not going to make a world of difference in terms of charging speed. The test conducted involves a fast Samsung wireless charger with the iPhone 8 Plus.