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Power Adapter Usage
2025-05-13
There are generally several important items to note on the label of a power adapter (hereafter referred to as adapter). First, the model of the adapter, for example, this adapter's model is XVE-120100, which tells us several pieces of information, such as its manufacturer and main parameters. Models starting with XVE usually indicate the company code; 120100 means this adapter is 12V 1A, while 050200 means 5V 2A. Second is the adapter's INPUT, which in China is generally AC100-240V~50-60Hz, indicating that this adapter can operate normally under AC voltage from 100V to 240V. Third is the adapter's OUTPUT, DC 12V=1A, representing a rated voltage of 12V DC and a maximum current of 1A. These two numbers can quickly calculate the wattage of the adapter; for example, this adapter's voltage 12V * current 1A = 12W (power), indicating this power supply is a 12W adapter.
Most laptop power adapters are suitable for use with 100–240V AC (50/60Hz). Basically, most laptops have external power supplies connected to the main unit by a power cord, which helps reduce the size and weight of the main unit. Only a very few models have the power supply built inside the main unit.
Every power adapter has a nameplate indicating power, input and output voltage, current, and other specifications. Special attention should be paid to the input voltage range. This is the so-called "travel power adapter" feature, which is very useful when traveling to countries where the mains voltage is only 110V. Some gray-market laptops are sold only in their country of origin and lack this voltage compatibility design, sometimes supporting only a single 110V input voltage. Plugging such an adapter into China's 220V mains voltage will cause it to burn out.
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Email:jingyuan1@delipower.ltd
Company Address: Building B, Fengshengyuan Industrial Park, Liaokeng Community, Shiyan Street, Bao'an District, Shenzhen
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