一直以來，果粉們都覺得iPhone充(chong)(chong)(chong)電(dian)(dian)(dian)太麻(ma)煩，因為與(yu)其他手機的充(chong)(chong)(chong)電(dian)(dian)(dian)接口根本不通用。現在，市面上有很多(duo)帶iPhone充(chong)(chong)(chong)電(dian)(dian)(dian)轉接口的產品，據說連上其他手機的充(chong)(chong)(chong)電(dian)(dian)(dian)器(qi)，也(ye)能給iPhone充(chong)(chong)(chong)電(dian)(dian)(dian)。那(nei)么，iPhone真能用轉接口混用其他充(chong)(chong)(chong)電(dian)(dian)(dian)器(qi)嗎？充(chong)(chong)(chong)電(dian)(dian)(dian)又(you)是否安全呢？

　　《快報時間》買來了兩種轉接口，一種是蘋果公司官網推薦的專用充電轉接口，另一種是網購的通用充電連接線。我們把這兩種連接設備，分別接到4款不同品牌的手機充電器、3款非品牌充電器和iPhone專用充電器上，看它們能否正(zheng)常給iPhone充電。

　　實驗一：測試蘋果公司官網推薦的專用充電轉接口，發現有兩款非品牌充電器無法正(zheng)常給iPhone充(chong)(chong)電(dian)(dian)(dian)。檢測充(chong)(chong)電(dian)(dian)(dian)器連(lian)接手機(ji)前輸出的空載(zai)電(dian)(dian)(dian)壓，這(zhe)兩款充(chong)(chong)電(dian)(dian)(dian)器的空載(zai)電(dian)(dian)(dian)壓分別是5.38伏(fu)(fu)、5.6伏(fu)(fu)，比其他六款都要高(gao)。

　　“iPhone在充電(dian)(dian)(dian)(dian)時有(you)限壓保護措施，當手(shou)機(ji)連接充電(dian)(dian)(dian)(dian)器時，會先檢(jian)測(ce)空(kong)載電(dian)(dian)(dian)(dian)壓，超過限壓大小時，就無(wu)法正常充電(dian)(dian)(dian)(dian)了。”中(zhong)國計量(liang)學(xue)院機(ji)電(dian)(dian)(dian)(dian)工程(cheng)學(xue)院蔡慧老師經測(ce)試得出結(jie)果(guo)當空(kong)載電(dian)(dian)(dian)(dian)壓高于5.47伏時，iPhone就會停(ting)止(zhi)充電(dian)(dian)(dian)(dian)。

　　可是，其中一款(kuan)非品牌(pai)充(chong)電(dian)(dian)(dian)器的(de)空載電(dian)(dian)(dian)壓(ya)(ya)只(zhi)有(you)5.38伏，為(wei)什么也不能正常(chang)充(chong)電(dian)(dian)(dian)呢？蔡慧老(lao)師說，萬用(yong)表測(ce)出來(lai)的(de)是電(dian)(dian)(dian)壓(ya)(ya)平均值(zhi)，與實際(ji)輸出電(dian)(dian)(dian)壓(ya)(ya)不同(tong)，因為(wei)輸出電(dian)(dian)(dian)壓(ya)(ya)里(li)有(you)紋(wen)波。紋(wen)波，簡(jian)單地說就是電(dian)(dian)(dian)流里(li)有(you)雜質，導致(zhi)電(dian)(dian)(dian)壓(ya)(ya)忽高(gao)忽低。“雖然這款(kuan)非品牌(pai)充(chong)電(dian)(dian)(dian)器的(de)平均電(dian)(dian)(dian)壓(ya)(ya)是5.38伏，可電(dian)(dian)(dian)壓(ya)(ya)最高(gao)值(zhi)有(you)5.63伏，波動(dong)很大，所以也會被iPhone限制無法充(chong)電(dian)(dian)(dian)。”

　　由此(ci)可(ke)見，并非所有(you)(you)的充(chong)(chong)電(dian)(dian)器接上轉接口，都能(neng)給iPhone充(chong)(chong)電(dian)(dian)。當充(chong)(chong)電(dian)(dian)器的空載(zai)電(dian)(dian)壓(ya)(ya)超(chao)過5.47伏，或充(chong)(chong)電(dian)(dian)器輸出電(dian)(dian)壓(ya)(ya)有(you)(you)雜質、電(dian)(dian)壓(ya)(ya)不穩定(ding)時，iPhone就會啟動限壓(ya)(ya)保護措施。

　　實驗二：測試網購的通用(yong)充(chong)電(dian)連接線，發現所有的充(chong)電(dian)器(qi)，都能正常給(gei)iPhone充(chong)電(dian)。

　　蔡(cai)慧(hui)老師說，連(lian)接線(xian)中有(you)分壓電(dian)(dian)路，還(huan)有(you)一定的濾(lv)波功能，能夠過(guo)濾(lv)部分雜質(zhi)，穩定電(dian)(dian)壓，但是因為(wei)無法(fa)確定到底過(guo)濾(lv)了(le)多少雜質(zhi)，電(dian)(dian)壓同(tong)樣會不(bu)穩定，所以還(huan)是不(bu)建(jian)議使用這種通用的充電(dian)(dian)連(lian)接線(xian)。

　　除了(le)輸出(chu)(chu)電(dian)壓(ya)過大的兩(liang)款(kuan)(kuan)充(chong)電(dian)器，其他能給iPhone充(chong)電(dian)的充(chong)電(dian)器使用時都安全了(le)嗎？我們對(dui)充(chong)電(dian)器連接iPhone后的輸出(chu)(chu)電(dian)流進行(xing)了(le)測試，發(fa)現幾款(kuan)(kuan)充(chong)電(dian)器的輸出(chu)(chu)電(dian)流都在iPhone的安全范圍內(nei)，但某(mou)品牌充(chong)電(dian)器、非(fei)品牌充(chong)電(dian)器兩(liang)款(kuan)(kuan)額定電(dian)流只有iPhone專(zhuan)用充(chong)電(dian)器的一半(ban)。

　　“iPhone額定電流是1000毫安，可這些充電器的額定電流只有500毫安，充電器長期處在滿載狀(zhuang)態，會縮短使用壽命，這樣的充電器我們不推(tui)薦使用。”