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連上充電轉接口 iPhone并不能混用所有充電器

一(yi)直以來(lai),果粉們(men)都覺(jue)得(de)iPhone充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)太(tai)麻煩,因為(wei)與其他(ta)手機的(de)(de)充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)接口根本不通用。現在,市面上(shang)有很多帶iPhone充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)轉接口的(de)(de)產品,據說連上(shang)其他(ta)手機的(de)(de)充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)器,也能給iPhone充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)。那(nei)么,iPhone真能用轉接口混用其他(ta)充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)器嗎?充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)又是(shi)否安全(quan)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(chong)電(dian)。檢測充(chong)電(dian)器連接手機前輸(shu)出(chu)的空載電(dian)壓(ya),這兩款(kuan)充(chong)電(dian)器的空載電(dian)壓(ya)分別是5.38伏、5.6伏,比其他(ta)六款(kuan)都要高。

  “iPhone在充(chong)電(dian)時有(you)限(xian)壓保(bao)護措(cuo)施(shi),當手機(ji)連接(jie)充(chong)電(dian)器(qi)時,會先檢測空載電(dian)壓,超過限(xian)壓大小(xiao)時,就(jiu)無(wu)法正常充(chong)電(dian)了。”中國計量(liang)學院(yuan)(yuan)機(ji)電(dian)工程學院(yuan)(yuan)蔡慧老師經測試得出結果當空載電(dian)壓高于5.47伏時,iPhone就(jiu)會停止充(chong)電(dian)。

  可(ke)(ke)是,其中一款(kuan)非(fei)(fei)品(pin)牌充(chong)電(dian)(dian)器的空(kong)載電(dian)(dian)壓(ya)(ya)只有(you)5.38伏,為(wei)什(shen)么也(ye)不能正(zheng)常充(chong)電(dian)(dian)呢?蔡慧老師(shi)說,萬用表(biao)測出來的是電(dian)(dian)壓(ya)(ya)平均值,與實際輸出電(dian)(dian)壓(ya)(ya)不同,因為(wei)輸出電(dian)(dian)壓(ya)(ya)里有(you)紋(wen)波。紋(wen)波,簡單地說就是電(dian)(dian)流里有(you)雜(za)質,導致(zhi)電(dian)(dian)壓(ya)(ya)忽(hu)高(gao)忽(hu)低。“雖(sui)然(ran)這款(kuan)非(fei)(fei)品(pin)牌充(chong)電(dian)(dian)器的平均電(dian)(dian)壓(ya)(ya)是5.38伏,可(ke)(ke)電(dian)(dian)壓(ya)(ya)最高(gao)值有(you)5.63伏,波動(dong)很大,所以也(ye)會被iPhone限制無法充(chong)電(dian)(dian)。”

  由此可見,并非所有(you)的(de)充(chong)電器接上轉接口,都能(neng)給iPhone充(chong)電。當充(chong)電器的(de)空(kong)載電壓超過5.47伏,或充(chong)電器輸出電壓有(you)雜質、電壓不(bu)穩定時,iPhone就(jiu)會啟(qi)動限壓保(bao)護(hu)措施。

  實驗二:測試(shi)網購的(de)通用(yong)充電(dian)連接線,發(fa)現所有的(de)充電(dian)器,都能正常給iPhone充電(dian)。

  蔡慧老師說,連(lian)接(jie)線中有(you)分壓(ya)電(dian)路,還(huan)有(you)一定的濾波(bo)功能(neng),能(neng)夠過濾部分雜(za)質,穩(wen)定電(dian)壓(ya),但(dan)是(shi)因為(wei)無法(fa)確定到底過濾了多少雜(za)質,電(dian)壓(ya)同樣會不穩(wen)定,所以還(huan)是(shi)不建議(yi)使用這種通(tong)用的充電(dian)連(lian)接(jie)線。

  除了輸出(chu)電(dian)(dian)壓過大的(de)兩款充電(dian)(dian)器(qi),其他能給iPhone充電(dian)(dian)的(de)充電(dian)(dian)器(qi)使用時都(dou)安全了嗎?我們對充電(dian)(dian)器(qi)連接iPhone后的(de)輸出(chu)電(dian)(dian)流進(jin)行(xing)了測試,發現幾款充電(dian)(dian)器(qi)的(de)輸出(chu)電(dian)(dian)流都(dou)在iPhone的(de)安全范圍內,但某品牌(pai)充電(dian)(dian)器(qi)、非品牌(pai)充電(dian)(dian)器(qi)兩款額定電(dian)(dian)流只有iPhone專用充電(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,充電器長期處在滿載(zai)狀態,會縮短使用壽命,這(zhe)樣的充電器我(wo)們(men)不推薦使用。”

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