I believe you all know something about the power adapter. The power adapter is connected by two parts. One side is the power adapter, and the other side is the power cord and the socket for plugging in the laptop. When that part of the power adapter fails, sometimes we just Just replace that part. There is no need to replace the connector side. This refers to the situation of borrowing other adapters. Of course, you can also buy a new set. So the question now is, can power supplies with the same nominal voltage be used on the same laptop if the output current is different? The basic principle is: a power supply with a large nominal current can replace a power supply with a small nominal current.

Some friends have misunderstandings, thinking that a power supply with a large nominal current will burn out the laptop because the current is too high. In fact, the current depends on the load when the voltage is the same, that is, the working condition of the laptop. When the laptop is running at high load, the current is larger. When the laptop enters standby, the current is smaller. In short, the current is equal to the added The voltage across the notebook is divided by the equivalent resistance of the notebook. A power supply with a large nominal current has sufficient current margin and will not cause overheating or low output voltage after replacing a power supply with a small nominal current.

On the contrary, using a small current power supply instead of a large current power supply will have the above dangers. However, some friends have no problem using a 72W power supply instead of a 56W one. The reason is that the power adapter is usually designed with a certain margin, and the load power is smaller than the power supply power, so this substitution is feasible for general use. , but it is undesirable to have little remaining power margin.

Can different output power adapters be mixed?

How can the laptop power adapter be used universally? Because sometimes my own power adapter suddenly has a problem, and I want to see if other people's power adapter can be used with my computer, but I am afraid that there will be problems when using it. Let me share my experience with you.

1. Conditions

1: The interface is the same. This is of course the first thing to pay attention to, because the interfaces are different and they cannot be connected, so of course they cannot be universal.

2: The output and input parameters are consistent. The parameters are current, voltage, and power. We can look at the parameters on the power adapter. If the power adapter is lost, we can go to the official website to check the specific parameters. Then buy according to the parameters, which is best for the computer. (Take ASUS notebook as an example)

3: Try to use the power adapter of the same model and specifications. We all know that the original power adapter is very expensive, so most of us are not willing to use the original power adapter. Therefore, we try to use power adapters of the same model and specifications.

2. Impact of use that does not meet the conditions

1: Affects battery life. Long-term use will consume the life of the battery. Because the current, voltage and power of the battery are different when used regularly, the power adapter will not be used properly, which will cause damage to the battery.

2: Affect the motherboard. If you use a power adapter with widely different parameters, the motherboard may be burned.