According to 9to5Mac‘s industry sources, “at least some” of the iPhone 15 models will be able to charge at speeds of up to 35W. That’s a significant improvement over the iPhone 14 Pro and Pro Max, for which Apple offers up to 30W charging… [I]t’s good news for you and for Apple too: faster charging is handy, and from Apple’s point of view it’s another sales opportunity to sell you an expensive charger – because of course iPhones don’t come with chargers in the box any more.
[W]e’ve had multiple reports in recent months suggesting that any fast charging capabilities will be limited to MFI-certified (Made For iPhone) chargers and cables, and given the reports that Apple may only offer the fastest data speeds to its best and most expensive iPhone 15 models, the iPhone 15 Pro and the iPhone 15 Pro Max, it’s highly likely that Apple will do exactly the same with fast charging.