Apple decided to raise the wireless charging current from 5W to 7.5W for the iPhone 8 and iPhone X. These phones launched with wireless charging capabilities, but it took Apple less than two months to realize charging was slow. iOS 11.2 lowered wireless charging times somewhat, but rumor has it 2018 iPhone wireless charging could be even faster.
The report claims that at least one of the upcoming 2018 iPhone models will use a copper wire coil instead of the current flexible printed circuit. The advantages are obviously faster wireless charging, while the downside is that copper wire coils are usually thicker than FPCs. Still, this would allow Apple to enable 10W or 15W wireless charging.
