bluetooth phone charger/xiaomi 20w charger

When the door is outside and the mobile phone is out of power, if there is a mobile phone charger nearby, you usually take it up and charge it directly. I believe everyone has had such mixed charging experience. Some people think it's dangerous to do this, others think it's OK, so can it be mixed? Let's take a look at the working principle of mobile phone charger first.

Charger is also called power adapter. As we know, the domestic civil rated voltage is 220 V, so it can't directly charge the mobile phone. The function of charger is to convert 220 V high voltage pulse into 5 V low voltage pulse, and then through a rectifier and voltage stabilizing circuit, it becomes stable DC, so that the mobile phone can accept it. However, only the charger can not charge the mobile phone. It also needs to be equipped with data cable and connected to the mobile phone to form a circuit and generate current. Therefore, the charging effect not only depends on the charger, but also closely related to the data line and the mobile phone itself.

In terms of chargers, generally, smart chips are built into chargers, which can automatically identify the current and voltage required by mobile phones, and then adjust themselves, so as to provide mobile phones with current and voltage within a safe range. For example, if you use a fast charging charger to charge a mobile phone that doesn't support fast charging, the charger will recognize that the mobile phone can't be charged quickly and adjust it to the normal charging mode. From the perspective of the mobile phone itself, there is also an automatic circuit control system inside the mobile phone, which can play the role of over-current, over-voltage and other protection to prevent excessive current and voltage from entering and damaging the mobile phone.

Similarly, the data cable is the same. Only high-quality data cable can play a normal role in charging, while poor quality data cable may cause damage to mobile phone charging. That's why we should try to use original or good third-party data cable to charge the mobile phone.