The laptop is now no longer a state-of-the-art technology product, and most people are able to buy it. However, when buying, we must pay attention to quality. When buying a laptop, you only need to look for a brand to purchase. Basically, there will be no

In the power adapter product nameplate, there is usually a parameter called the efficiency level (Efficiency Level), usually expressed in Roman numerals, which relates to the efficiency of the power adapter. The higher the energy efficiency level, the hig