How to choose a car charger? Do you know this cold knowledge?
No matter whether you have a car or not, I believe that many people will be used to finding a car charger (referred to as car charger) to charge their mobile phones whenever they are driving or riding in the car. They use the time they are in the car to charge their mobile phones to avoid low battery when getting off. Mobile navigation is the most common thing in the car. However, mobile phones consume a lot of power when navigating. How do you choose a car charger? Do you know this cold knowledge? Now let's have a detailed understanding of what cold knowledge we have!
1、 Is it necessary to purchase additional car charger if the car has its own USB charging interface?
Most of the USB interfaces in the vehicle are set for audio data transmission, so the interface current of most vehicles is only 5V/0.5A. If the current is very small, the equipment will be damaged. Therefore, it is necessary to purchase additional car chargers.
2、 After charging with USB, the power does not increase but decreases?
Most of the USB interfaces in the car are designed to transmit data. When the mobile phone is used for navigation in the car, although the mobile phone shows that it is charging, the current is only about 0.5A. The power consumed in the same time is actually greater than the power when charging, so the situation of no rise and no fall occurs. If the current is not up to the standard, it will be damaged
Mobile phone, so it is necessary to buy a car charger. However, the car owners should pay attention to the following points when choosing car chargers: choose car chargers with protection against overheating, overcurrent, short circuit, overvoltage, overload, etc. These protections can not only protect the safety of mobile phones, but also protect the circuit safety of cars; Next, select a car charger with an output current of more than 2A.
3、 Can the charging current be large or small?
That is to say, the output current of the car charger cannot be greater than the maximum rated input power of the mobile phone. After knowing the following examples, you will instantly understand that it is important to buy a high-quality car charger. Don't waste thousands of dollars to destroy a mobile phone for a car charger.
4、 Will the instant charging of the vehicle be affected?
At the moment of starting, the current ordinary vehicles will power off the cigarette lighter due to self-protection, so even if the device is plugged into the charger, it will not affect the use of the on-board charger (vehicle charger) as long as the voltage regulator in the vehicle operates normally.
For example, if the output of the car charger is 5v/2.1A and the maximum rated input power of a mobile phone is 5V/1A, the car charger inputs 1A to the mobile phone. If the input power of another device (tablet computer) is 2A, the battery can be fully charged in a shorter time. However, if a car with an output current of 5V/0.5A charges the same mobile phone, the input power is 0.5A, which is not only slow, but also very hot, It will damage the mobile phone for a long time.
5、 Mobile phone supporting fast charging needs a car charger supporting fast charging
Many mobile phones on the market now support fast charging. If the device supports fast charging, it needs to be charged by the car that supports fast charging. The technology of fast charging is generally to increase the current/voltage when the voltage/current is constant, so the charging time will be greatly shortened.
6、 Is it normal for the charger/mobile phone to heat up during charging?
When the car charger is used, part of the electrical energy of the transformer inside the charger will be converted into heat energy. It is normal for the charger or the mobile phone to generate heat during the charging process. However, it should be noted that if the temperature has reached a hot point, whether it is a charger quality problem should be considered.