There are three reasons why you can't charge:
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1. The USB port is faulty
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2. There is a problem with the charging cable
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3. There is a problem with the phone interface
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You can go through them one by one, usually because of the line.
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1. When charging, the voltage is unstable, resulting in no charging. When the power is turned on, the mobile phone or other smart electronic products will generally open the power monitoring and detection program. If the program detects that the vehicle flush voltage is unstable, it prohibits the flush. When using the seat, there will be no program for detection, it is recommended to use the usb interface of the car audio computer system to charge, whether it is a line or a seat.
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2, check whether the car charger parameters meet the charging requirements to check the car charger output voltage, current, whether to support their own digital products. Some parameters do not meet, such as the output current for 1A car to charge the tablet computer, it is not rushed into the electricity. This is caused by insufficient current, and a high-power car charger needs to be replaced.
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3, check whether the contact of the car charger is good contact Some car charger contact design is unreasonable, there will be poor contact in the process of driving, and lead to the arrival of the destination found that there is no charge.
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4, the cigarette lighter itself is not normal power supply if you replace a number of car chargers, mobile phones, etc., can not normally use the car charger in your car to charge, at this time to check whether there is a problem with your car fuse.
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5, the quality of the charger itself is now on the market of car power brands, product good and bad, the price gap is large, if you buy shoddy products, not only can not charge, but also is likely to burn car fuses and digital products, and even may harm personal safety. When buying a car charger, be sure to pay attention to the purchase of a safe and secure smart car charger!