Early testing shows 7.5W ‘fast’ wireless charging has small effect on Qi charging speed

“The iOS 11.2 betas include support for faster 7.5 watt wireless charging; the current public releases of iOS 11 limit iPhone 8 and iPhone X to 5W Qi wireless charging only. However, what is the practical impact of this change? Early testing shows that the improvements in charging speed using a 7.”
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