There are generally several items on the label of the power adapter (hereinafter referred to as adapter) that need attention. The first is the model of the adapter. For example, the model of this adapter is XVE-120100. It tells us some information, including its manufacturer, main parameters, etc. The beginning of XVE is generally ##Company code, 120100 is the description of this The adapter is 12V1A, 050200 is 5V2A; the second is the INPUT of the adapter, which is generally AC100-240V~50-60Hz in China, which shows that the adapter can work normally under the AC voltage of 100V-240V ; The third is the adapter's OUTPUT (output), DC 12V=1A, which represents a direct current with a rated voltage of 12V, and a maximum current of 1A. Two numbers can quickly calculate the wattage of the adapter. For example, for this adapter, voltage 12V*current 1A=12W (power), indicating that the power supply is a 12W adapter.
The power adapter of most notebook computers can be suitable for 100～240V alternating current (50/60Hz). Basically, most notebook computers have an external power supply, and use a power cord to connect to the host, which can reduce the size and weight of the host. Only a few models have the power supply built in the host.
There is a nameplate on the power adapter, which indicates power, input and output voltage and current and other indicators. Pay special attention to the range of input voltage. This is the so-called "travel power adapter". If you go to a country where the mains voltage is only 110V At the time, this feature is very useful. Some parallel-imported laptops are only sold in the country of origin. There is no such compatible voltage design, and even a single input voltage of 110V. It will burn when plugged in under the 220V mains voltage in our country.
