iPhone15 charging supports up to 30 W. It utilizes the latest charging technologies, including fast charging and wireless charging capabilities. This means that users can use an adapter that supports 30W power output for fast charging in order to restore battery power faster. In addition, the iPhone 15 also supports wireless charging technology, which allows it to be paired with a compatible wireless charger for charging without the need for a charging cable. Overall, iPhone 15 charging supports 30W power, providing a more efficient charging experience.