The use of wireless chargers for iPhones leads to faster battery wear, repair site iFixit concludes based on its own tests. The temperature of the battery is much higher than with wired charging.
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The battery reached a maximum temperature of 30 degrees Celsius with wired charging, while with wireless chargers the temperature reached a maximum at 35-45 degrees Celsius, writes iFixit. The wireless chargers are also less efficient because they use more energy for the same amount of charging. If users also leave the chargers in the wall socket, wireless chargers without use also use more than a wired charger.
There is a difference between the tested wireless chargers. The Apple MagSafe charger is the most efficient and coolest because it is best aligned by the magnets. A poorly laid out Amazon charger performed less well, and a Tesla charger with many coils turned out to be the least efficient.