Three development status of notebook power adapter!

         Since the birth of the laptop, it has been more than thirty years. As an important productivity tool to promote human development, the laptop has now become an indispensable role around us, and with the continuous development of so many years, , Security, stability and other aspects are not the same, but at the same time you can also find that its supporting hardware notebook power adapter has not changed much! Without a unified standard, there will be such a complicated classification of notebook power adapters. At present, the most difficult problem for notebook power adapters is that there is no unified standard, and various power adapters grow wildly, so the notebook power we have seen They are all varied and difficult to classify. They can be classified by brand, such as several well-known international manufacturers (in alphabetical order): Acer (Acer), APPLE (Apple), ASUS (ASUS), DELL (Dell), HP (HP), LENOVO (Lenovo) , TOSHIBA (Toshiba). According to the use, it is divided into AC (for example, household and office use AC is called AC), DC (for example, in cars and airplanes, DC is called DC). According to the output voltage and current (on the label on the back of the charger, generally written after OUTPUT, how much V, how much A is written), which includes 12V series, 15V series, 16V series, 18.5V series, 19V series, 19.5V Series, 20V series, 24V series, etc., this is just the voltage, the current of the same series can be very different ~ In addition, even if the voltage and current are the same, the chance of their interface size being the same is also very small, just from the shape of the interface , Long, flat, square, round, however, the circle is also divided into big and small circles ... so it is really difficult to make a wood?