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The car charger with the fast charge function has a certain impact on the car, it will cause some harm to the car battery, if the product quality problems or improper use will cause security risks:
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1, the car charger has no automatic power off function, after the car is turned off, the charger is still working, if it has not been unplugged, and for a long time did not start the car, it may consume the power of the car battery, not only affects the service life of the vehicle battery, but also when the car is to be used, it will not fire.
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2, the car charger does not belong to the original car, there will be some problems in the degree of adaptation of the vehicle, considering the long-term discharge of the car charger, and there will also be leakage phenomenon at the socket, so it may affect the safety of the car.
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3, poor quality car charger there are many security risks, due to the insufficient protection function of the circuit, if the buck and current limiting circuit failure, may lead to 12V voltage directly into the mobile phone, harm the mobile phone products.
The car usb fast charge has no effect on the car battery, because when the mobile phone uses the car fast charge, the power consumption is very small, and the life of the car battery is basically not affected.
The main role of the USB interface on the car is to use the standard power supply on the car to charge the DC-5V electrical appliances with USB as the interface, or as a fixed power interface for electrical appliances. USB interface, which belongs to the vehicle transmission line, the transmission speed is fast
Impact, because the voltage is too high will lead to damage, the car USB fast charge because the voltage can reach 12 volts, so the battery will lead to loss of power phenomenon