If you are a dual USB car charger, it is OK! However, some car charging will cause diversion, so that the two mobile phone electric current is too small, there will be a slow charging situation. For example, my Apple screen consumes a lot of power, when charging, if my friends around me are just charging millet, millet power consumption is large, the general car charge will be charged less and less electricity, and the problem of slow charging of multiple mobile phones in the car is no more