The magnet does affect the phone, but it must be very strong magnetic to have an impact on some of the functions of the phone.
In fact, the phone itself has magnets inside, to achieve some functions, such as wireless charging, will be affected by strong magnets. In addition, the sensors inside the phone, such as the digital compass, will also be affected by the magnet display error.
Small magnetic magnets (such as the small magnetic block on the mobile phone case, magnetic mobile phone holder, etc.) generally do not affect the function of the mobile phone.
Wireless charger, mainly using inductive coupling technology, because the coupling technology is mainly through the magnetic field of the coil to generate current, the internal component of the battery itself can not constitute a magnetic field, so it will not damage the internal structure of the battery during the power-on process.