跟本Apple就疑似限死左某啲牌子先支援7.5w
https://www.macrumors.com/guide/iphone-x-fast-charging-speeds-compared/
For a separate post on wireless charging options, we've been investigating third-party wireless chargers, and it's looking like there may be a restriction put in place by Apple to limit 7.5W charging to approved manufacturers. As an example, on the Amazon page for this charger from Choetech, which says it is 7.5W, there is this message:
We get notice from Apple engineer that current IOS only support 5w qi wireless charging currently, 7.5w wireless charging is encrypted and never released to 3rd party manufacturer.
We've heard similar information from other manufacturers, but it's all very nebulous and not something Apple has clearly outlined at this point. For that reason, if you want confirmed 7.5W wireless charging, go with the Belkin, the Mophie, or another charger that specifically states that it's compatible with Apple's 7.5W charging.