又叫外置電源，是小型便攜式電子設備及電子電器的供電電壓變換設備，常見于手機、液晶顯示器和筆記本電腦等小型電子產品上。接下來飛天鷹科技來給您介紹一下筆記本電源適配器的使用說明。

在電(dian)源(yuan)適配器(qi)的(de)(de)標(biao)簽上面一般會有幾(ji)項是需要(yao)(yao)注意(yi)的(de)(de)。第(di)(di)一，是型號，它告(gao)訴(su)了我們幾(ji)個(ge)(ge)信息，就(jiu)(jiu)是它的(de)(de)廠商、主(zhu)要(yao)(yao)參數等，XVE開頭(tou)的(de)(de)一般就(jiu)(jiu)是某某公(gong)司代號，120100就(jiu)(jiu)是說明這(zhe)(zhe)個(ge)(ge)電(dian)源(yuan)是12W的(de)(de)，050200的(de)(de)就(jiu)(jiu)是10W的(de)(de)；第(di)(di)二就(jiu)(jiu)是INPUT（輸入），在中國通用的(de)(de)一般是100-240V~50-60Hz，這(zhe)(zhe)說明這(zhe)(zhe)個(ge)(ge)adapter可以在100V-240V的(de)(de)電(dian)壓(ya)下面正常(chang)工作；第(di)(di)三就(jiu)(jiu)是adapter的(de)(de)OUTPUT（輸出），兩(liang)個(ge)(ge)數字可以很快(kuai)速的(de)(de)算出這(zhe)(zhe)個(ge)(ge)電(dian)源(yuan)的(de)(de)瓦(wa)數，例(li)如電(dian)壓(ya)12V*電(dian)流1A=12W（功率），說明這(zhe)(zhe)個(ge)(ge)電(dian)源(yuan)就(jiu)(jiu)是12W的(de)(de)。

多(duo)數筆(bi)記(ji)本(ben)電(dian)(dian)(dian)(dian)(dian)腦的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)源(yuan)適配器可以適合(he)用于100～240V交(jiao)流電(dian)(dian)(dian)(dian)(dian)（50/60Hz）。基本(ben)上(shang)大部份的(de)(de)(de)筆(bi)記(ji)本(ben)電(dian)(dian)(dian)(dian)(dian)腦都把(ba)電(dian)(dian)(dian)(dian)(dian)源(yuan)外置，用一條電(dian)(dian)(dian)(dian)(dian)源(yuan)線和主(zhu)(zhu)機連接(jie)，這樣(yang)可以縮小主(zhu)(zhu)機的(de)(de)(de)體積和重量，只有(you)(you)極少數的(de)(de)(de)機型把(ba)電(dian)(dian)(dian)(dian)(dian)源(yuan)內置在主(zhu)(zhu)機內。在電(dian)(dian)(dian)(dian)(dian)源(yuan)適配器上(shang)都有(you)(you)一個銘牌，上(shang)面(mian)標示著功(gong)率，輸(shu)入輸(shu)出(chu)電(dian)(dian)(dian)(dian)(dian)壓和電(dian)(dian)(dian)(dian)(dian)流量等指標，特別要注(zhu)意輸(shu)入電(dian)(dian)(dian)(dian)(dian)壓的(de)(de)(de)范圍，這就(jiu)是所謂的(de)(de)(de)“旅行電(dian)(dian)(dian)(dian)(dian)源(yuan)適配器”，如果到市(shi)(shi)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)壓只有(you)(you)110V的(de)(de)(de)國家時，這個特性就(jiu)很有(you)(you)用了，有(you)(you)些水貨筆(bi)記(ji)本(ben)電(dian)(dian)(dian)(dian)(dian)腦是只在原產地銷(xiao)售的(de)(de)(de)，沒有(you)(you)這種兼(jian)容電(dian)(dian)(dian)(dian)(dian)壓設計，甚至只有(you)(you)110V的(de)(de)(de)單一輸(shu)入電(dian)(dian)(dian)(dian)(dian)壓，在我國的(de)(de)(de)220V市(shi)(shi)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)壓下插上(shang)就(jiu)會燒(shao)毀(hui)。