How to calculate the power of the power supply adapter China?
The power of the power supply adapter China will affect whether it can supply power to the electrical appliance and the charging efficiency. Generally speaking, the power of the power supply adapter China is marked on the nameplate. If not, you can calculate it yourself. The calculation method of the power of the power supply adapter China is:
1. Find the nameplate of the power supply adapter China, look at the parameters above, and find the output parameters. The general format is (output) O/P: xV/xA.
2. Multiply the voltage of the output parameter by the current to get the power of the power supply adapter China. For example, if the output parameter is 10V/4A, its power is 10*4=40W.

What will happen if the power of the power supply adapter China is not enough?
When choosing an adapter, pay attention to the size of the output voltage and current, and choose a product with a suitable power size, otherwise it may have a certain impact on the computer, and in severe cases it will damage the computer:
1, no response, can not open
Insufficient power of the power supply adapter China will lead to a serious shortage of power supply to the computer. The specific performance is that sometimes it can be turned on normally, and sometimes it takes a few clicks to turn on.
2. The hard disk makes a strange noise
If the notebook computer is equipped with too many storage devices, or the power of the power supply adapter China is too low to meet multiple storage devices in terms of power supply, it may happen that the boot cannot pass the startup self-check.
3. Frequent restarts and inability to enter the system
Insufficient power supply may also lead to unstable startup and login, sometimes it will stay still on the startup screen, and sometimes it will automatically restart during the startup process. Generally speaking, if the power of the power supply adapter China is not enough, the main reason is that the power supply of the computer is insufficient. So what should I do if the power of the power supply adapter China is not enough? The solution is to change to a more powerful power supply adapter, or reduce some of the computer's power consumption.