The reasons are as follows: 1, the compatibility mode level has a problem, which will cause the cigarette lighter to be paired with the car charger, and the situation will be broken for a while.
2, the car charger and the cigarette lighter in the middle of the bad contact phenomenon, resulting in no reflection of the car charger, so in the case of the installation of the car charger, it is necessary to ensure that it is fixed in time, when you hear a \"da\" in the process of installation is timely.
3, the vehicle cigarette lighter problem, at this moment we must apply the original cigarette lighter to distinguish whether the jack is running normally.