Which one of wireless or wired charging will damage the battery?

First of all, the low-power wireless charging of mobile devices (mobile phones) currently uses inductive wireless power transmission systems. On the mobile phone side, the difference between wired charging and wireless charging is as follows: the input of wired charging is a constant voltage source, which passes through a direct-to-direct (DCDC) converter, usually a switched capacitor (SC), to achieve segmented power supply for the mobile phone battery (constant voltage). Current, constant voltage, variable current charging). In the wireless charging method, the energy generates a high-frequency induced voltage in the receiving coil on the mobile phone through a high-frequency magnetic field. The frequency is generally above 100kHz. The compensation topology (required for an inductive wireless charging system), a synchronous rectifier, and a DCDC converter are implemented as Segmented power supply for mobile phone battery.

Unqualified chargers will be more likely to cause battery degradation.

Wireless charger charging and wired charging have the same loss of battery. Because whether it is wired charging or wireless charging, the last step must be the last step to stabilize the electricity sent, but the paths of the two are different.