According to an unnamed source, wireless charging in the new iPhone will be slow. This is reported by the resource as PhoneArena.
In a new iPhone almost definitely will be used the technology of wireless battery life, all have been waiting for a long time. It is not known exactly whether it is compatible with standard Qi 1.2 or remain proprietary. But if Apple will go the way of unification, then wait for the support fast wireless charging with power of 15W is not worth it. Most likely the company will be limited to seven and a half watts: 1.5 A and 5V.
In addition, the use of the Qi standard does not guarantee compatibility with third party accessories. Apple may block it with additional MFi controller. This will make the charge of your smartphone safer, preventing damage to the unit in case of discrepancy, the battery charger standards, but certainly hit the pockets of users.