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select the whole match with the power adapter. Optional power adapter before the machine's electrical parameters need to know basic information, select the whole match with the power adapter. For example, the notebook computer equipped with a power adapter, you must confirm that their use voltages and the use of current, the optional power adapter output voltage must be rated with the same notebook, and the output current is at least greater than or equal to the input laptop current laptop to work properly. 3 Check the power adapter identification. Include: rated voltage or rated voltage range, power nature of the symbols, the rated frequency or rated frequency range, rated current, the manufacturer's name or trademark, model, ? type "return" symbol, safety instructions, CCC mark and other information, writing shall identify the clear and easy to erase. 4 Check the power adapter plug and interface. Plug the power adapter output interface should be smooth with no rust, in the purchase of the power adapter plug should pay attention to their compliance with national standards (for example, should be no hole on the bolt, nor is cylindrical, etc.). In addition, the output interface, the coincidence with the machine is also very important to choose the interface should not be too loose or too tight interface, the power adapter. laptop ac adapter Acer laptop ac adapter Dell laptop ac adapter Hp laptop ac adapter Toshiba laptop ac adapter
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