Are power adapters universal? What should we pay attention to when purchasing?

There are times when the laptop battery suddenly runs low and needs to be recharged to continue using it, but without a power adapter, this situation is very anxious and embarrassing. So can power adapters be universal? What should we pay attention to when purchasing?

1. Can the power adapter be universal?

Different power adapter brands are not universal!

1. Different interfaces: most laptop power adapter brands have different interfaces. Different interfaces are relatively safe, because at least you won't insert a power adapter with inconsistent current or voltage to power the laptop, which will cause damage to the computer hardware.

2, different voltage: different brands of laptop power adapter voltage is not the same. Laptop power adapters of different brands cannot be used for power supply, even if the power adapter interfaces are the same.

3, different current: different brands of laptop power adapter current is not the same. Check the voltage and current specifications even if the power adapter is used between laptops of the same brand.

Two, the purchase of power adapter should pay attention to the following aspects:

1. Clear signs and complete information. Marking is the important information to instruct the user to install and use correctly, and it is the most basic content to ensure the safety of the user's personal property. At a minimum, the following information should be included: name, trademark or identification mark of the manufacturer or distributor; Model code or model specification; Power supply properties; Rated power supply voltage range; Output voltage range, etc.

2. Pay attention to the rated power supply voltage range. Because Chinese city power voltage is 220V, so when the purchase of adapter, the range of its rated power voltage (that is, input voltage) should contain 220V, otherwise the adapter is not only not normal use, but may bring insecure dangers such as burn, breakdown short circuit.

3. Pay attention to the voltage properties of the output. The output of the power adapter can be AC or DC. Select the voltage type that meets the requirements of the intended use. On the label of the power adapter, the AC symbol is ~, and the DC symbol is -. If you choose an adapter with a DC output, you should also consider the consistency of the positive and negative polarity of the output terminals with the requirements of the device.

4. Note the output current and voltage range. The output current and voltage is an important indicator to select the adapter, and should be in line with the current and voltage required by the electrical and electronic products to supply power. If the selected voltage and current are too high, it will damage electronic and electrical products, if the selected voltage and current are too low, the equipment can not work normally or overload work and affect the safety performance.

5, whether there is a safety certification mark. From design to mass production, power adapter products need to go through a series of tests to verify whether they meet the safety requirements. For example, the products through the safety certification test will be sold with a "CCC" mark.

Different power adapter brands are not universal! Buy a power adapter also need to pay attention to a lot! Be careful with electrical appliances, so as to keep us safe!