Apple's next iPhone is rumored to come with a 10W USB-C wall charger, giving users a faster charging experience. Still, consumers should not expect to see a USB-C port in place of the company's signature Lightning port on the device itself.
https://www.notebookcheck.net/Rumor-iPhone-8-to-have-faster-charging-with-a-10W-wall-charger.230618.0.html
My 2015 Note 5 (non-exploding, of course) came with a 15W charger. And the iPhone 8 is rumored to come with a 10W charger.