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What are the reasons why the car USB cannot charge?

1 Answers

DelMariana

07/30/25 2:51am

Car USB cannot charge due to damaged USB port, blown fuse of the vehicle's USB port, faulty charging cable, or issues with the phone's charging port. Solutions for car USB not charging: Damaged USB port: Only professionals at 4S shops or auto repair shops can fix it. Blown fuse of the vehicle's USB port: Replace the fuse at a 4S shop. Faulty charging cable: Try replacing the charging cable. Issues with the phone's charging port: Check for any foreign objects causing poor contact. Precautions for charging via car USB port: Generally, the USB ports in cars are designed for data transfer, so the current is only about 0.5A and the voltage is 5V. While charging a phone, there may be a response, but the charging speed is relatively slow. If you use the phone while charging, it may even drain the battery faster than it charges. Therefore, it is recommended to purchase a cigarette lighter charger instead. Functions of the car's USB port: Inserting a USB drive to listen to music, charging a phone, connecting a USB car cigarette lighter, connecting a car vacuum cleaner, connecting a radar detector, or a dashcam.

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