как правильно выбрать модели адаптера для ноутбука?

There are several items on the label of the power adapter that need attention. First, it's the adapter model, for example, the model of the adapter is PA-1650-66, it tells us a few information, that is, its manufacturer, wattage, etc. The beginning of PA is generally produced by LITEON, 1650 means that the adapter is 65W , 1750 is 75W, 90CD/SB is 90W; the second is the INPUT of the adapter, which is generally 100-240V~50-60Hz in China, which means that this adapter can be used in 100V-240V The voltage below works normally; the third is the adapter's OUTPUT (output), two numbers can quickly calculate the wattage of this adapter, for example, this adapter, 19*3.42=64.98, indicating that this is a 65W adapter. 　　Адаптер питания большинства портативных компьютеров может быть рассчитан на переменный ток 100 ～240 В (50/60 Гц).