一直(zhi)以來，果粉們都覺得(de)iPhone充(chong)(chong)電(dian)太麻煩，因為與其(qi)他(ta)(ta)手機的充(chong)(chong)電(dian)接(jie)口(kou)(kou)(kou)根本不通(tong)用(yong)。現(xian)在，市(shi)面上有很多帶iPhone充(chong)(chong)電(dian)轉接(jie)口(kou)(kou)(kou)的產品，據(ju)說連(lian)上其(qi)他(ta)(ta)手機的充(chong)(chong)電(dian)器(qi)，也能給(gei)iPhone充(chong)(chong)電(dian)。那么，iPhone真能用(yong)轉接(jie)口(kou)(kou)(kou)混用(yong)其(qi)他(ta)(ta)充(chong)(chong)電(dian)器(qi)嗎？充(chong)(chong)電(dian)又是否安全呢(ni)？

　　《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(shang)，看它(ta)們能否正常給iPhone充電(dian)。

　　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(fa)正(zheng)常給(gei)iPhone充(chong)(chong)電(dian)(dian)。檢測充(chong)(chong)電(dian)(dian)器連接手機前(qian)輸(shu)出的空(kong)載電(dian)(dian)壓，這(zhe)兩(liang)款(kuan)充(chong)(chong)電(dian)(dian)器的空(kong)載電(dian)(dian)壓分別是(shi)5.38伏、5.6伏，比其(qi)他(ta)六款(kuan)都要(yao)高。

　　“iPhone在充(chong)(chong)(chong)電(dian)(dian)時(shi)(shi)有限壓保護措(cuo)施，當手(shou)機連接充(chong)(chong)(chong)電(dian)(dian)器時(shi)(shi)，會(hui)(hui)先(xian)檢測空(kong)載電(dian)(dian)壓，超過限壓大小時(shi)(shi)，就(jiu)無法正(zheng)常充(chong)(chong)(chong)電(dian)(dian)了(le)。”中國計(ji)量學(xue)院機電(dian)(dian)工(gong)程學(xue)院蔡慧老(lao)師(shi)經測試得出結果當空(kong)載電(dian)(dian)壓高于5.47伏時(shi)(shi)，iPhone就(jiu)會(hui)(hui)停(ting)止(zhi)充(chong)(chong)(chong)電(dian)(dian)。

　　可是(shi)(shi)，其中一款非品牌充電(dian)(dian)(dian)(dian)器的(de)空載(zai)電(dian)(dian)(dian)(dian)壓(ya)只有(you)5.38伏，為(wei)什么也不能(neng)正常充電(dian)(dian)(dian)(dian)呢？蔡(cai)慧(hui)老師說，萬(wan)用(yong)表測出來的(de)是(shi)(shi)電(dian)(dian)(dian)(dian)壓(ya)平均值(zhi)，與實際輸出電(dian)(dian)(dian)(dian)壓(ya)不同，因為(wei)輸出電(dian)(dian)(dian)(dian)壓(ya)里有(you)紋波。紋波，簡單(dan)地說就是(shi)(shi)電(dian)(dian)(dian)(dian)流(liu)里有(you)雜(za)質(zhi)，導(dao)致電(dian)(dian)(dian)(dian)壓(ya)忽(hu)高忽(hu)低。“雖(sui)然(ran)這款非品牌充電(dian)(dian)(dian)(dian)器的(de)平均電(dian)(dian)(dian)(dian)壓(ya)是(shi)(shi)5.38伏，可電(dian)(dian)(dian)(dian)壓(ya)最高值(zhi)有(you)5.63伏，波動很大，所以也會(hui)被iPhone限制無法(fa)充電(dian)(dian)(dian)(dian)。”

　　由此(ci)可見(jian)，并(bing)非所有的(de)充(chong)(chong)(chong)電器接上轉接口，都能給iPhone充(chong)(chong)(chong)電。當充(chong)(chong)(chong)電器的(de)空(kong)載電壓(ya)超(chao)過5.47伏，或充(chong)(chong)(chong)電器輸出電壓(ya)有雜質、電壓(ya)不穩定時，iPhone就會啟(qi)動(dong)限壓(ya)保護措施。

　　實驗二：測試網購的通用(yong)充電連接線，發現所有的充電器(qi)，都能正常給iPhone充電。

　　蔡慧老師說(shuo)，連接線(xian)中有(you)分(fen)(fen)壓(ya)電(dian)路，還有(you)一定的濾(lv)波(bo)功能，能夠過濾(lv)部分(fen)(fen)雜質，穩(wen)定電(dian)壓(ya)，但是(shi)(shi)因(yin)為無(wu)法確定到底過濾(lv)了多少(shao)雜質，電(dian)壓(ya)同樣會不(bu)穩(wen)定，所以還是(shi)(shi)不(bu)建(jian)議使用(yong)這種通(tong)用(yong)的充電(dian)連接線(xian)。

　　除了輸(shu)(shu)出(chu)電(dian)壓過大的(de)兩款(kuan)充電(dian)器(qi)，其他(ta)能(neng)給iPhone充電(dian)的(de)充電(dian)器(qi)使用(yong)時都(dou)安全了嗎？我(wo)們對充電(dian)器(qi)連(lian)接(jie)iPhone后的(de)輸(shu)(shu)出(chu)電(dian)流進(jin)行了測試，發現幾款(kuan)充電(dian)器(qi)的(de)輸(shu)(shu)出(chu)電(dian)流都(dou)在(zai)iPhone的(de)安全范圍內，但某品牌(pai)充電(dian)器(qi)、非品牌(pai)充電(dian)器(qi)兩款(kuan)額定電(dian)流只(zhi)有iPhone專用(yong)充電(dian)器(qi)的(de)一(yi)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(zai)狀態，會縮短使(shi)(shi)用壽命(ming)，這樣的充電器我們不推薦使(shi)(shi)用。”