The iPhone12 wireless charging does not hurt the battery, and the iPhone12 has MagSafe feature for wireless charging using magnetic enhancement.
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iPhone12MagSafe Accessory Cleaning instructions: The MagSafe charger's built-in magnets may attract debris during daily use. Before cleaning this fitting, please sweep any debris from the metal ring. Disconnect the MagSafe charger and wipe the silicone in the center of the charging area with a slightly damp lint-free cloth. Do not use window cleaners, household cleaners, sprays, solvents, ammonia, abrasives, or cleaners containing hydrogen peroxide to clean the MagSafe charger.
It will not hurt the battery, but the charging speed is slow, and it takes a long time to fill