Can power adapters be universal?

- Oct 20, 2017-

The function of the power adapter is to convert the 220 volt high voltage into 5 volts to 20 volts, so that they can work normally. Without it, it will bring a lot of inconvenience to our daily use. Power adapter, also known as external power supply, is a small portable electronic equipment and electronic equipment supply voltage conversion equipment, commonly used in mobile phones, liquid crystal display and notebook computers and other small electronic products.

Is it possible to use all power adapters?

First, different specifications of the "adapter" can not be universal, the key points are as follows: firstly, the voltage must be consistent, otherwise it will burn the electric appliance, or not; the power adapter, the output current must be greater than the use of electrical current, otherwise, the power adapter will "current" the power adapter, burned; and the electric appliance interface must match, otherwise unable to connect. Fourth, the positive and negative polarity should be consistent, so as to avoid accidents.

Two, the general power adapter input specifications are AC AC 100-240V, 50-60Hz, this input range is universal, do not worry.  The main point is to look at the output voltage and current of the power adapter, and whether the size of the interface is matched with your equipment. For example, the mobile phone charger 5V500mA, can also use 5V 700mA, 800mA, 5V1A and so on, as long as the voltage is consistent, a larger current can be compatible with small current use. It's better not to go too far apart.

Three, power adapter can not be universal, there are three obstacles, the first is the use of different manufacturers notebook voltage is different, IBM are 16V, COMPAQ mostly 18.5V, SONY part of the model is 19.5V, are not unified. Second different laptops need different currents, from 2A to 5.4A, small machines need less current, larger machines are larger. Third is different manufacturers laptop power adapter interface is different, it is difficult to use. So there's no power adapter for all laptops at this time.

Four. Why laptop power adapters are not universal?

Notebook computer power adapter is not general whether we encountered such a situation? In some cases suddenly notebook computer battery, and not bring the power adapter, and a bit of work is not completed, this situation is very worrying and embarrassment. Some friends may try to borrow other laptop power adapters at this time, but it's important to note that different brands of laptop power adapters are not universal, at least for now. The main reasons for not being universal are three:

1, the interface is different

The interface between most laptop power adapter brands is different, which means that the use of other brands of power adapter can not be inserted into your laptop for power supply.  Different interfaces are relatively safe, because at least you don't plug in the power adapter that the current or voltage doesn't match, powering your laptop, causing damage to your computer hardware.

2, different voltage

Different brands of laptop power adapter voltage is not the same, for example: in general, IBM is 16V, Dell is 20V, Hp is 18.5V, Sony is 19.5V and so on. Thus, even if the power adapter interface is the same, you can not use different brands of laptop power adapter for power supply.

3, the current is different

Different brands of laptop power adapter current is not the same, for example: in general, IBM is 4.5A, Dell is 3.34A, Hp is 2.7A, Sony is 4.1A and so on.

In fact, the same brand laptop power adapter voltage and current is not the same. So, even if the same brand of laptop between the use of power adapter, also confirm the voltage and current specifications.