一直以來，果粉們(men)都覺得(de)iPhone充(chong)(chong)電(dian)太(tai)麻煩(fan)，因為與其他(ta)手機的(de)充(chong)(chong)電(dian)接口根本不通用(yong)。現(xian)在(zai)，市面上(shang)有很多帶iPhone充(chong)(chong)電(dian)轉(zhuan)接口的(de)產品，據說連上(shang)其他(ta)手機的(de)充(chong)(chong)電(dian)器，也能給iPhone充(chong)(chong)電(dian)。那么(me)，iPhone真(zhen)能用(yong)轉(zhuan)接口混(hun)用(yong)其他(ta)充(chong)(chong)電(dian)器嗎？充(chong)(chong)電(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(shang)，看(kan)它們(men)能(neng)否正常給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常給iPhone充電(dian)(dian)。檢測充電(dian)(dian)器(qi)連接手機前(qian)輸出的空載電(dian)(dian)壓，這兩款充電(dian)(dian)器(qi)的空載電(dian)(dian)壓分別是5.38伏、5.6伏，比其他(ta)六款都要高。

　　“iPhone在(zai)充電(dian)(dian)(dian)(dian)時(shi)有限壓保護(hu)措施，當手機(ji)連接充電(dian)(dian)(dian)(dian)器時(shi)，會(hui)先檢(jian)測空載(zai)電(dian)(dian)(dian)(dian)壓，超(chao)過限壓大小(xiao)時(shi)，就無法正常充電(dian)(dian)(dian)(dian)了(le)。”中國計(ji)量學院機(ji)電(dian)(dian)(dian)(dian)工程學院蔡慧老師經測試(shi)得出結(jie)果(guo)當空載(zai)電(dian)(dian)(dian)(dian)壓高于5.47伏時(shi)，iPhone就會(hui)停止(zhi)充電(dian)(dian)(dian)(dian)。

　　可是(shi)，其中一款(kuan)非(fei)品牌(pai)(pai)充(chong)電(dian)(dian)(dian)器(qi)的空載電(dian)(dian)(dian)壓只有(you)5.38伏(fu)，為(wei)什么也不能正常充(chong)電(dian)(dian)(dian)呢？蔡慧(hui)老師說，萬用表測出(chu)(chu)來的是(shi)電(dian)(dian)(dian)壓平(ping)均值，與實(shi)際輸出(chu)(chu)電(dian)(dian)(dian)壓不同，因為(wei)輸出(chu)(chu)電(dian)(dian)(dian)壓里(li)有(you)紋(wen)波(bo)。紋(wen)波(bo)，簡單(dan)地說就是(shi)電(dian)(dian)(dian)流里(li)有(you)雜質，導(dao)致(zhi)電(dian)(dian)(dian)壓忽高(gao)忽低。“雖(sui)然這款(kuan)非(fei)品牌(pai)(pai)充(chong)電(dian)(dian)(dian)器(qi)的平(ping)均電(dian)(dian)(dian)壓是(shi)5.38伏(fu)，可電(dian)(dian)(dian)壓最高(gao)值有(you)5.63伏(fu)，波(bo)動(dong)很大，所以也會被(bei)iPhone限(xian)制無法充(chong)電(dian)(dian)(dian)。”

　　由此可見(jian)，并非所有的充電器(qi)接上轉接口，都能給iPhone充電。當充電器(qi)的空載電壓超(chao)過5.47伏，或(huo)充電器(qi)輸出電壓有雜(za)質、電壓不穩定時，iPhone就會啟動限壓保護措施。

　　實驗(yan)二：測試(shi)網購的通用充(chong)(chong)電連接線，發現所(suo)有的充(chong)(chong)電器，都能正常給iPhone充(chong)(chong)電。

　　蔡慧老師說，連接線中有分壓(ya)(ya)電(dian)路，還(huan)有一定(ding)的(de)濾(lv)波功(gong)能，能夠過濾(lv)部分雜(za)質，穩定(ding)電(dian)壓(ya)(ya)，但是(shi)因(yin)為無法確定(ding)到底過濾(lv)了多少(shao)雜(za)質，電(dian)壓(ya)(ya)同樣會(hui)不穩定(ding)，所以還(huan)是(shi)不建議使用這種通用的(de)充電(dian)連接線。

　　除了輸(shu)出電(dian)(dian)壓過大(da)的(de)兩(liang)款充(chong)電(dian)(dian)器(qi)，其(qi)他能給(gei)iPhone充(chong)電(dian)(dian)的(de)充(chong)電(dian)(dian)器(qi)使用時都安(an)全(quan)了嗎(ma)？我們對充(chong)電(dian)(dian)器(qi)連(lian)接iPhone后(hou)的(de)輸(shu)出電(dian)(dian)流(liu)(liu)進行了測(ce)試，發現幾款充(chong)電(dian)(dian)器(qi)的(de)輸(shu)出電(dian)(dian)流(liu)(liu)都在iPhone的(de)安(an)全(quan)范圍(wei)內，但某品牌充(chong)電(dian)(dian)器(qi)、非(fei)品牌充(chong)電(dian)(dian)器(qi)兩(liang)款額定(ding)電(dian)(dian)流(liu)(liu)只有(you)iPhone專用充(chong)電(dian)(dian)器(qi)的(de)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(chang)期處在(zai)滿載狀態，會(hui)縮(suo)短使(shi)用壽(shou)命，這樣的(de)充電器我們不推薦使(shi)用。”