The power adapter is a power supply voltage conversion device for small portable electronic equipment and electronic appliances. It is mainly used as a power supply device for tablet computers, routers, mobile phones and other products. As more and more household electronic products enter our daily life, the use of power adapters is becoming more and more frequent. Power adapters with quality defects can cause damage to electronic equipment, or cause fires and other safety accidents. Therefore, we give the following suggestions on how to select qualified power adapters:
1. When purchasing a power adapter, you should choose a power adapter that matches the whole machine.
Before purchasing a power adapter, you need to know the basic information such as the electrical parameters of the whole machine, and choose a power adapter that matches the whole machine. For example, the power adapter used with a notebook computer must confirm its operating voltage and current. The output voltage of the purchased power adapter must be consistent with the rated voltage of the notebook computer, and the output current must be at least greater than or equal to the input current of the notebook computer. computer to work properly.
2. Observe the appearance of the power adapter
a. The pins and joints of the power adapter should be processed finely, cleanly and without rust. It should be noted that the power plug on the power adapter should conform to the plug style specified by the state.
The surface of the plastic part of the power adapter shell is flat and smooth without burrs, and the color is uniform. The seams of the shell should be tight and there should be no gaps when pressed. The weight of the power adapter itself should not be too light, and it should not feel hollow when knocked.
b. Before purchasing the power adapter, you need to observe the nameplate content, which should include: rated voltage or rated voltage range, symbol of power supply nature, rated frequency or rated frequency range, rated current, trademark, model, safety instructions, safety certification marks, etc. In addition, if it is a Class II product, there should be a “回” symbol, and the writing on the nameplate should be clear and not easy to erase, and there should be sufficient safety warning instructions on the nameplate (such as whether there are warnings applicable to areas at an altitude of 2000m and non-tropical areas) ).
c. Pay special attention to the range of the input voltage. This is the so-called “travel power adapter”. This feature is very useful if you go to a country where the mains voltage is only 110V. Some parallel laptops are only sold in the country of origin. Without this compatible voltage design, even with a single input voltage of 110V, it will burn out when plugged in under 220V mains voltage.
d. The product should have formal packaging, good packaging and printing quality, and product-related information.
3. The exquisite appearance of the product is of course very attractive to purchase, but at the same time when purchasing products, you should also pay attention to product safety and electromagnetic compatibility.
Have you got all the above skills?