Why does the Xiaomi 15 heat up when charging in the screen-off or power-off status?

Several factors will make the Xiaomi 15 heat up when charging in the screen-off or power-off status, such as power conversion losses, heat retention from the environment, and multiple APPs that are running in the background.
If the Xiaomi 15 heats up when charging in the screen-off or power-off status, please refer to the following details:
1. The Xiaomi 15 adopts 90W wired charging technology, which has a fast charging speed. The Xiaomi 15 will heat up in the process of charging, which is normal;
2. It is recommended that you expose your phone to the air when charging and reduce contact and wrapping with fabrics such as clothing to ensure a good heat dissipation environment, and effectively reduce the temperature.