When using third-party charging products, minor noise could occur due to several potential factors related to the charging process and the compatibility of the accessories, but this does not affect normal usage.
The detailed information is as follows:
1. Third-party power banks or chargers can not fully comply with Xiaomi’s charging standards or can not be optimized for the Xiaomi 15’s charging system, leading to interference or noise during charging;
2. Some power banks and chargers use DC-AC conversion in their power circuits, and this process can produce electrical noise that will be audible, especially when the charger is under load.
It is recommended to use the Xiaomi official charger for a better wireless charging experience.