Why can’t the Xiaomi 15 Ultra use the charging port in the car?

The Xiaomi 15 Ultra supports both wired and wireless charging, with capabilities of up to 90W for wired charging and 80W for wireless charging. However, achieving these charging speeds requires compatible chargers that support the necessary protocols and power outputs.​
If you can’t use the charging port in the car to charge the Xiaomi 15 Ultra, please refer to the following troubleshooting steps:​
1. Make sure the charging cable is firmly inserted into the charging port. It is recommended that you use the official charging cable that comes with the package contents;
2. Please opt for high-quality car chargers that support the necessary protocols and offer higher power outputs. Many car chargers provide lower power outputs, such as 18W or 22W, which are below the Xiaomi 15 Ultra's maximum charging capabilities. This can lead to suboptimal charging performance;
3. The Xiaomi 15 Ultra features a prominent camera module, which could not fit the wireless charger completely, thus affecting the charging efficiency. If you prefer wireless charging, select a car charger designed to accommodate larger devices or those with substantial camera modules; ​
4. Connect the charger after the car is started to avoid abnormal charging due to low voltage when the engine is not started;
5. Avoid charging when high-power devices such as air conditioners and lights are running to reduce circuit load fluctuations.