Xiaomi Buds 4 uses USB-C interface for charging and supports fast charging function. Users can use the original USB-C charging cable or charger to charge the device, or use other standard USB-C ports to charge the device. The charging case of Xiaomi Buds 4 supports wireless charging function, and users can use the charger that supports Qi wireless charging for wireless charging. It is recommended that users use the original charging cable or charger to charge when using Xiaomi Buds 4 to ensure charging efficiency and charging safety. At the same time, it is also important to avoid using incompatible chargers or charging cables to avoid damage to the device.