Most of the USB interfaces are designed to transfer data. When navigating on the phone, while the mobile phone is displayed, the current consumes only 0.5A, the power consumed in the same time is actually greater than the charge at the time of charging. Therefore, there will be no re-decline, if the current does not meet the standard, it will damage
Mobile phone, so it is necessary to buy a car charger. But the owner should pay attention to the following points at the purchase of a car, choose the car charger of over temperature, overcurrent, short circuit, overvoltage, overload, which can not only protect the safety of mobile phones, but also protect the circuit of the car. Safety; secondly select the car charger of the output current 2A.