Buy a Car Charger

Whether you have a car, you have to look at it. I believe that many people will use the car charger (referred to as car charger) to the mobile phone, and use the car to charge the mobile phone to mobile phone in the car. It is the most common thing to get off the battery, and the mobile phone navigation is the most common thing. However, when the navigation, the phone is very powerful, how to choose the car, how to choose?
Is there any other car charge with an self-contained USB charging interface on the car?

For the USB interface in the vehicle, it is set for audio data transmission, so the interface current of most vehicles is only 5V / 0.5A, and the current is very small if the current does not meet the standard, it will damage the device, so the car It is necessary to buy a car charger.