Nowadays, more and more people cannot leave without smartphones, taking pictures, surfing the Internet, especially when we are driving, if we use the navigation function of the mobile phone, the the battery power of phone is dropping very quickly. Once the mobile phone is powered off, it will really drive people crazy.

Some friends mentioned the car charger. Yes, this thumb-sized car charger that perfectly solves this problem. It uses the car's cigarette lighter to power the phone, and no longer has to worry about the phone being out of power. Although the car charger are small, but limited to the characteristics of the car voltage, so we must pay attention to the following safety issues, and also the standard for selecting car chargers.

Output current

The input voltage of the normal car charger is 12V-24V, the output voltage is 5V, and the output current is quite different. Fast charging car charger for mobile phones, as well as charging for tablets and charging treasures, require 2A of current. Although some cars have a USB interface, the current is only about 500mA, and the charge in the mobile navigation process is not enough. For example: Using a current of 2.4A car charger to charge a 3100mAh of Huawei honor 7, which can be fully charged in one and a half hours. And for the original USB port inside the car, it takes eight hours to be fully charged.

Overcurrent and short circuit protection

The limit current of the car charger is 5A. If it exceeds 5A, the charging component will heat up or even burn. In addition, if the cigarette lighter enters the debris, it may trigger a short circuit. If the short circuit is light, the cigarette lighter will be damaged, and the heat will be fired, so the overcurrent and short circuit is also important.

After we knew what is car charger, and we must also master the safe use method.

1. Recharge after startup the car

Be sure to plug in the device after the engine has started. When the car is ignited, the voltage will affect the charging effect and even damage the car charger.

2. Pay attention to the use environment

Do not use the car charger during thunderstorms; do not use it after washing the car. The humidity inside the car is likely to cause corrosion and oxidation of components.

3. Reduce high power usage

Do not power more than three devices at the same time to prevent excessive power damage to the device.

4. Pull out the plug when not in use

Choose a safe branded product and pay attention to the correct method of use.