Wireless Charging May Cause Faster Battery Degradation in iPhones, iFixit Study Finds

Based on its own testing, repair site iFixit has concluded that using wireless chargers for iPhones can accelerate battery wear compared to wired charging. The temperature of the battery during wireless charging is notably higher than during wired charging.

According to iFixit, during wired charging, the battery reached a maximum temperature of 30 degrees Celsius. However, with wireless chargers, the temperature peaked at 35-45 degrees Celsius. Additionally, wireless chargers are less efficient, consuming more energy for the same charging capacity. Moreover, if left plugged in, wireless chargers consume more power without actively charging a device compared to wired chargers.

There are variations among the tested wireless chargers. The Apple MagSafe charger, thanks to its precise alignment with magnets, is both the most efficient and coolest. Conversely, a poorly installed Amazon charger exhibited lower performance, while a Tesla charger with numerous coils proved to be the least efficient.