The five main points of choice for a metal car charger

With the continuous development of modern science and technology, intelligent mobile phone function more and more, the screen is bigger and bigger, also can serve as a sound when driving, navigation, etc., but also the power loss of faster. As the Spring Festival approaches, it is the rhythm of the crazy people to go out on the highway. So the metal car charger was born, things may be small, but on the choice also cannot careless, let below small make up to tell you the metal car charger to buy five points.

1, the output current

The input voltage of the metal car charger on the market is basically 12V - 24V, the output voltage is 5V, and the output current is about 1A ~ 4A. Although most of the cars also have USB ports, the current is about 500mA, which is not enough to charge when you're using your phone to navigate. In the case of the iphone 4s, which has a battery capacity of 1470mAh, the current charge can be filled in two hours or so, and the amount of time it takes to use a USB port in the car is nearly doubled.

2, overload protection,

The USB specification requires no more than 5A for current overload protection. Metal car charger to overload protection because when the output current is too large and normal output value more than itself, charger components can shorten life or because the temperature too high cause damage and even burn. So the metal car charger in the car must have overload protection.

3, short circuit protection

Short circuit protection is also necessary, because if a short circuit is short, the lamplighter is safe and the fire burns. Basic on the market all metal car charger has short circuit protection device, but when the short circuit equipment after unplug, some products need to pull the equipment start automatically after continue to power supply, unplug power still not after a short circuit devices, some products need to pull out from the cigarette lighter insert again to continue to supply. Of course, it would be more convenient for the owner to automatically restore the charger.

4, LED lights

The metal car charger on the market is equipped with an LED light night light to make it easier to identify when driving at night. But the brightness of the LED lights should pay attention to, because the day driving, does not have what effect, but if too bright at night may distract drivers, affect driving safety, generally the LED brightness in both can see USB interface position and not dazzling.

Whether the electricity will be charged after the fire has been extinguished

Although 80 percent of vehicles are powered by a cigarette lighter after pulling the key, there is also a part of the car's cigarette lighter. If the owner forgets to pull out the metal car charger, will there be any damage to the car battery? Generally speaking, metal car chargers do not have a current output without a load. Even if you forget to pull out, there is only a small LED light on your job, and the amount of electricity you lose can be ignored.