How to choose a good power adapter?

As the capabilities of smart devices increase, their power consumption starts to increase. People are getting used to carrying around portable chargers or power adapters. For many people, the concept of a power adapter is just a charger, but in fact a power adapter is a kind of transformer that is widely used in chargers. People who are not familiar with the power adapter often need to face what kind of power adapter to use for charging.

The power adapter has a wide variety of parameters, so you can't use the adapter to charge at will. Before choosing a power adapter, three conditions of adaptation are determined.

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

2.For the reason why the voltage is consistent, the principle is that the voltage is insufficient, not enough to drive the load, the battery can not be charged properly, said the popular point is in short supply.
3. As to why such a current configuration is needed, it involves the principle of the circuit. Everyone knows that the Power Supply has an internal resistance. The greater the internal resistance, the greater the loss. Therefore, when the manufacturer produces this adapter, it will determine the no-load output voltage within a certain range according to the internal resistance, and the current critical value corresponding to the voltage critical value is the nominal value of the current we see. The larger the nominal value of the current, the better the carrying capacity of the adapter. So instead of harming the battery, choosing an adapter with a slightly higher current will make charging faster.

Best regards,

Ada Zheng