Can always be inserted in the cigarette lighter, no harm to the circuit. The car charger uses a series switching power supply. When not in use, its circuit automatically stops working. So will not affect the work of the circuit. The quiescent current of its circuit is about 1-2mA, which does not have any effect on the circuit. At the same time, when the car key is turned off, the cigarette lighter has no electricity. So, plug it in the cigarette lighter.

There are many friends who like to use a car charger while playing with a mobile phone. In fact, this approach is very dangerous. The battery enters into continuous charging. As a result, the charging time of the mobile phone is prolonged. As a result, the current and voltage of the mobile phone are unstable. This causes the battery to easily age and may even cause problems. Causes an explosion. Especially when playing large-scale games while filling, the mobile phone memory enters a high-speed operation state, which will generate a large amount of heat. In addition, some heat will be generated when the mobile phone is charged, and the mobile phone will become hot and hot. If the heat is not distributed at this time, it is easy. Dangerous.

When the cigarette lighter is inserted, it will automatically pop up after reaching a certain temperature and will not harm the vehicle. If the pop-up device is broken, it will continue heating until the vehicle is damaged or dead. As for the insertion of other electrical appliances, there is no problem if the quality of the appliance itself is not a problem. In fact, generally only the start needs to use the battery, the rest of the time the car uses the generator's electricity, and in general there is more than enough power. Some people will tangled access to high-power appliances, usually with a cigarette lighter converter car power will be within a certain range, and most of them are inserted into similar electronic dog, car mp3 and the like, with little power. Even if the car refrigerator, there will be no problem. But if you turn off the fire at the same time, but also keep the whole vehicle power, that is, the key to insert a grid (if not remember correctly), then you may use up all the power within the power (usually only the refrigerator has this ability). That means it can't be reignited. Can use external power supply to charge or replace the battery solution. If the power of the appliance is too large, that is, if it is out of specification, headlight brightness will be reduced during the driving process, and all the electrical devices on the vehicle will fail, such as power windows, navigation and so on.