For many people, the concept of power adapter only stays at the stage of chargers, but in fact, power adapters are a kind of transformers that are widely used in chargers. People who are not familiar with power adapters often need to face the question of which power adapter to use for charging.

Power adapters have a wide variety of parameters, so it is not possible to use the adapter for charging at will. Before choosing a power adapter, you first need to determine three adaptation conditions.

First, the interface of the adapter matches the device;

Second, the output voltage must be the same as the rated input voltage of the load (mobile equipment), or within the voltage range that the load (mobile equipment) can bear, otherwise, the load (mobile equipment) may be burned;

Third, the output current of the power adapter should be equal to or greater than the current of the load (mobile device) to provide sufficient power;

The following is an analysis of the above three adaptation conditions.

First, do not plug in mismatched interfaces without professional knowledge, otherwise it will be dangerous.

Second, as for why the voltage needs to be consistent, in principle, it is like this - the voltage is insufficient, not enough to drive the load, and the battery cannot be charged normally.

Third, as for why such a current configuration is needed, this involves the principle of the circuit, we all know that the power supply has internal resistance, and the larger the internal resistance, the greater the loss. Therefore, when the manufacturer produces this adapter, it will determine that the no-load output voltage is within a certain range according to the internal resistance, and the current critical value corresponding to the voltage critical value is the current nominal value we see, and the larger the current nominal value, the better the load capacity of the adapter. So choosing an adapter with a slightly higher current will not only not hurt the battery, but will make charging faster.

This article briefly introduces how to choose a power adapter according to your needs, and gives three easy-to-understand selection conditions, and then explains these three conditions separately, which is very suitable for novices to read. I hope you can gain something after reading this article, and the editor will also bring you more basic knowledge.