Why is the wireless charging speed of the Xiaomi 15 slow?

To enhance the experience in terms of battery endurance, the Xiaomi 15 has a significantly larger battery capacity. However, since the charging power remains unchanged, a larger battery naturally requires a longer time to fully charge. This is a normal phenomenon. Before leaving the factory, the device undergoes rigorous professional inspection to ensure the charging power meets the required standards, so you can use it with confidence.
To improve wireless charging efficiency, please refer to the following tips:
1. Place the Xiaomi 15 correctly on the charging pad to ensure proper alignment with the charging coil;
2. Ensure you are using a Xiaomi-certified wireless charger with the maximum supported power output;
3. Wireless charging generates more heat than wired charging. Charge in a cool, well-ventilated environment to prevent thermal regulation from slowing down the process.