iphone 8/plus/x as Apple’s first support for wireless charging models, consumers get a new way of charging, it is good, but the charging speed is not very “cool” , In short, it is “too slow”, Apple has not turned on fast charge feature yet in IOS11.1, but now Apple’s latest iOS11.2 Supports 7.5W Wireless Fast charge.
According to chongdiantou, they received the news of industry engineers, Apple’s latest iOS11.2 quietly turned on the 7.5W wireless fast charge, but no mention in the upgrade log. This increases the wireless charging power by 50 percent, making wireless charging speed significantly higher.Through unremitting efforts, the engineer successfully adjusted the wireless charging products to 7.5W quick charge status.
The engineers use their 15W wireless charging transmitter, found that the input voltage current up to 9.14 V, 1.46 A, which means the power of the transmitter is 13.4 W. The power delivered to the cell phone after energy transfer is 8W. [13.4w(Transmitter input power) x 80% (wireless transmitter loss) x 80% (wireless receiver loss) x 94% (Internal efficiency of mobile phone) = 8W (The real charging power of the phone)], It reached the Apple 7.5W wireless fast charge power standard.
The phone 8 is running at 7.5W fast charging state and greatly reduces the time of full charge. The conclusion is that the iphone has been successfully verified and can be stable and running on 7.5W wireless fast charger.