A switching power supply is designed in the circuit, in which the switching transformer will emit a squeaking noise, which is a high oscillation frequency sound issued by the magnetic core is not tight. It's a transformer. They all make sounds just big and small. The squeak emitted by the high-frequency transformer is not loud and has no effect on the circuit and can be ignored.
The lithium battery of the charging treasure is the same as that of the mobile phone, most of them are 7Ring, which enhances the wireless charging effect of the phone, and has a magnetic force of up to 10N, which perfectly matches the wireless charging ring of the charging device.
2, the magnetic absorption of the magnetic shell. The middle of the mobile phone case is embedded with a small ring holding wireless charging magnetic ring, which can improve the wireless charging effect of the mobile phone, and the magnetic force is as high as 10N, which perfectly matches the wireless charging ring of the charging device.
At present, the world's first wireless fast charge is the Millet 9 Pro, which supports 30W wireless fast charge, and the wireless full charge time is faster than the wired charging of some mobile phones. And since wireless fast charging has not lost to wired, then the previous 5W low power useless theory has become history, after all, compared with wired charging, wireless charging is more convenient, without deliberately plugging.
At the same time, the Mi 11Ultra is compatible with the 120W charger of the Mi 10Ultra, although it can only work in 11V 6A Max 66W mode, but the speed is poor with the 67W chargerThe difference is not much, millet 11Ultra compatible 10Ultra 55W wireless charger, also supports 50W Max charging, but the speed is still some gap with the 80W charger 67W Max, which can be used but the 80W charger experience is better.
The iPhone 8 supports fast charging, which can be charged up to 50% in 30 minutes. But the specific charging power has not been announced. 26 USB PD chargers were tested. The test used Apple's official 2m double-ended Type-C cable and Apple's official Type-C to lightning cableThe test tool is POWER-Z FL00. The test environment is room temperature 26℃, the remaining battery of the phone is between 30% and 60%, and the phone is in the state of startup screen. Let's look at the specific test data.