If the USB interface on the car cannot be charged fast, it may be because the current output of the USB interface is insufficient. You can try the following methods to solve the problem:
1. Ensure that the ignition switch of the vehicle is turned on and the USB interface is powered.
2. Use the original fast charge data cable, because the poor quality data cable may not provide enough current.
3. Try to replace other USB interfaces, some vehicles may have different output currents.
4. If the car does not have the original fast charge function, you can consider buying an on-board charger, which usually provides a higher current output to support the fast charge function.
If the above methods do not solve the problem, it is recommended that you consult the vehicle manufacturer or professional maintenance technicians for a more accurate solution.
USB interface on the car, no way, fast charging is the car, because the result is no way to fast charging, only ordinary charging