一直以(yi)來，果(guo)粉們都(dou)覺得iPhone充(chong)(chong)電太麻煩(fan)，因為(wei)與(yu)其(qi)他手機的充(chong)(chong)電接口(kou)根(gen)本(ben)不通用(yong)(yong)(yong)。現在(zai)，市(shi)面上有(you)很多帶iPhone充(chong)(chong)電轉接口(kou)的產品，據說連上其(qi)他手機的充(chong)(chong)電器，也能(neng)給iPhone充(chong)(chong)電。那么，iPhone真能(neng)用(yong)(yong)(yong)轉接口(kou)混用(yong)(yong)(yong)其(qi)他充(chong)(chong)電器嗎？充(chong)(chong)電又是否安全呢？

　　《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(men)能(neng)否正常給iPhone充(chong)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常給iPhone充(chong)電(dian)。檢測充(chong)電(dian)器連接手機前輸出的(de)空(kong)載(zai)電(dian)壓，這兩款(kuan)充(chong)電(dian)器的(de)空(kong)載(zai)電(dian)壓分別是(shi)5.38伏、5.6伏，比其他六款(kuan)都(dou)要高。

　　“iPhone在充(chong)電(dian)時(shi)有限壓(ya)保護(hu)措施，當手(shou)機連接充(chong)電(dian)器時(shi)，會先(xian)檢測空(kong)載(zai)(zai)電(dian)壓(ya)，超過(guo)限壓(ya)大小(xiao)時(shi)，就無法正(zheng)常充(chong)電(dian)了。”中國計(ji)量學院機電(dian)工(gong)程學院蔡(cai)慧老師經測試得(de)出(chu)結果當空(kong)載(zai)(zai)電(dian)壓(ya)高(gao)于5.47伏時(shi)，iPhone就會停止充(chong)電(dian)。

　　可(ke)是，其中一款(kuan)非(fei)品牌充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)器的空載電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)只有5.38伏，為(wei)什么也不能正常(chang)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)呢(ni)？蔡慧老(lao)師說(shuo)，萬用表(biao)測出來的是電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)平均值(zhi)，與實(shi)際輸(shu)出電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)不同，因為(wei)輸(shu)出電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)里有紋(wen)波(bo)(bo)。紋(wen)波(bo)(bo)，簡單(dan)地說(shuo)就(jiu)是電(dian)(dian)(dian)(dian)(dian)流里有雜質，導(dao)致電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)忽高忽低。“雖然這款(kuan)非(fei)品牌充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)器的平均電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)是5.38伏，可(ke)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)最高值(zhi)有5.63伏，波(bo)(bo)動很大，所以也會被iPhone限(xian)制無法充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)。”

　　由此可見，并非所有的充電(dian)(dian)(dian)(dian)(dian)器接上轉接口，都能給iPhone充電(dian)(dian)(dian)(dian)(dian)。當(dang)充電(dian)(dian)(dian)(dian)(dian)器的空(kong)載電(dian)(dian)(dian)(dian)(dian)壓超過(guo)5.47伏，或充電(dian)(dian)(dian)(dian)(dian)器輸出電(dian)(dian)(dian)(dian)(dian)壓有雜質、電(dian)(dian)(dian)(dian)(dian)壓不(bu)穩(wen)定(ding)時，iPhone就會啟(qi)動限(xian)壓保護措施(shi)。

　　實驗二：測試網購(gou)的通用充電(dian)(dian)連(lian)接線，發現所有的充電(dian)(dian)器，都(dou)能(neng)正常給iPhone充電(dian)(dian)。

　　蔡慧(hui)老師說，連接線中有分壓(ya)(ya)電路，還有一定(ding)的濾(lv)波(bo)功能(neng)，能(neng)夠過濾(lv)部分雜質，穩定(ding)電壓(ya)(ya)，但是因為無法確定(ding)到底過濾(lv)了多少(shao)雜質，電壓(ya)(ya)同樣會不(bu)穩定(ding)，所以還是不(bu)建議使用(yong)這(zhe)種通(tong)用(yong)的充電連接線。

　　除(chu)了(le)輸出(chu)電(dian)(dian)(dian)(dian)壓過大的兩款(kuan)充(chong)電(dian)(dian)(dian)(dian)器(qi)，其他能給(gei)iPhone充(chong)電(dian)(dian)(dian)(dian)的充(chong)電(dian)(dian)(dian)(dian)器(qi)使(shi)用(yong)時都安(an)全了(le)嗎？我(wo)們對充(chong)電(dian)(dian)(dian)(dian)器(qi)連(lian)接(jie)iPhone后(hou)的輸出(chu)電(dian)(dian)(dian)(dian)流(liu)進行(xing)了(le)測(ce)試，發(fa)現幾(ji)款(kuan)充(chong)電(dian)(dian)(dian)(dian)器(qi)的輸出(chu)電(dian)(dian)(dian)(dian)流(liu)都在iPhone的安(an)全范(fan)圍內，但某(mou)品(pin)牌(pai)充(chong)電(dian)(dian)(dian)(dian)器(qi)、非品(pin)牌(pai)充(chong)電(dian)(dian)(dian)(dian)器(qi)兩款(kuan)額定電(dian)(dian)(dian)(dian)流(liu)只有iPhone專用(yong)充(chong)電(dian)(dian)(dian)(dian)器(qi)的一半。

　　“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(qi)處(chu)在滿載狀(zhuang)態，會(hui)縮短使用(yong)壽命，這樣的充(chong)電(dian)器我們不(bu)推薦(jian)使用(yong)。”