一、用汽車usb給手機充電好嗎

開車出行時，導航、拍照、打電話等都會導致手機耗電快，有時許多車主會直接用車載usb接口給手機充(chong)電，那么(me)usb接口充(chong)電好嗎？

答案是否定的(de)(de)(de)(de)。大(da)(da)部(bu)分車(che)內的(de)(de)(de)(de)USB接(jie)(jie)口(kou)都(dou)是為了音頻數據(ju)傳(chuan)輸(shu)(shu)而設(she)置的(de)(de)(de)(de)，電(dian)(dian)流只有5V/0.5A，而大(da)(da)部(bu)分手機的(de)(de)(de)(de)輸(shu)(shu)入電(dian)(dian)流需求為1A，一旦與車(che)內的(de)(de)(de)(de)USB接(jie)(jie)口(kou)連(lian)接(jie)(jie)的(de)(de)(de)(de)話，這些接(jie)(jie)口(kou)僅(jin)能(neng)輸(shu)(shu)出0.5A的(de)(de)(de)(de)電(dian)(dian)流，會大(da)(da)大(da)(da)延長充(chong)電(dian)(dian)時間(jian)，導(dao)致充(chong)電(dian)(dian)慢，長此以(yi)往你會發現，手機耗電(dian)(dian)越來(lai)越快，電(dian)(dian)池越來(lai)越不耐用，甚至電(dian)(dian)路板都(dou)損(sun)壞(huai)了，因此，不建(jian)議用汽(qi)車(che)usb接(jie)(jie)口(kou)給(gei)手機充(chong)電(dian)(dian)，應急使(shi)(shi)用的(de)(de)(de)(de)話還好，長期使(shi)(shi)用是肯定會縮短手機使(shi)(shi)用壽命的(de)(de)(de)(de)。

除(chu)了(le)影響手(shou)機外，用(yong)汽(qi)車(che)usb給手(shou)機充電(dian)的(de)缺(que)點還有(you)一個就是成本更(geng)高(gao)，據統計，手(shou)機在(zai)用(yong)USB端口充電(dian)的(de)時候，會使每加侖汽(qi)油(you)（約3.8L）的(de)駛(shi)里程降低(di)約0.48公里，加大了(le)油(you)耗，充電(dian)成本還是相當高(gao)的(de)。

該圖片由注冊用戶"荊湖酒徒"提供，版權聲明反饋

二、車載usb充電慢怎么解決

用車載(zai)usb充電(dian)(dian)(dian)慢是必(bi)然的，因為它的輸出(chu)電(dian)(dian)(dian)流較低(di)，如(ru)果在(zai)用車載(zai)usb充電(dian)(dian)(dian)的同時還開導航(hang)，你(ni)會(hui)發現不僅充不進(jin)去電(dian)(dian)(dian)，反而電(dian)(dian)(dian)量會(hui)降低(di)，那(nei)么車載(zai)usb充電(dian)(dian)(dian)慢怎么辦呢？

1、接專門的usb充電口

很多車型為(wei)了方(fang)(fang)便消費者，會(hui)專門在車上(shang)設(she)置一(yi)個為(wei)手(shou)機充電(dian)的地(di)方(fang)(fang)，一(yi)般(ban)在手(shou)扶箱下方(fang)(fang)，或者是后面排風出口的附近，并且上(shang)面還會(hui)顯(xian)示有電(dian)流(liu)標(biao)示，這種usb口的輸(shu)出電(dian)路更(geng)大，能用于手(shou)機充電(dian)。

2、安裝車載充電器

用(yong)車(che)載充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)器，從點煙器取電(dian)(dian)(dian)(dian)(dian)，經過(guo)(guo)電(dian)(dian)(dian)(dian)(dian)子電(dian)(dian)(dian)(dian)(dian)路把電(dian)(dian)(dian)(dian)(dian)流調制成適合(he)手(shou)(shou)(shou)機充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)壓電(dian)(dian)(dian)(dian)(dian)流后給手(shou)(shou)(shou)機使用(yong)。不(bu)(bu)過(guo)(guo)購(gou)買車(che)載充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)器時要(yao)注意，車(che)載充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)器的(de)(de)(de)USB接口(kou)一般會(hui)設置兩種不(bu)(bu)同(tong)的(de)(de)(de)額定(ding)(ding)電(dian)(dian)(dian)(dian)(dian)流，分別是(shi)2.1A和1A，在使用(yong)的(de)(de)(de)過(guo)(guo)程(cheng)當(dang)中(zhong)，也(ye)要(yao)注意的(de)(de)(de)選(xuan)擇的(de)(de)(de)接口(kou)不(bu)(bu)能小于手(shou)(shou)(shou)機的(de)(de)(de)最(zui)大(da)額定(ding)(ding)輸入功率(lv)，不(bu)(bu)然也(ye)會(hui)導(dao)致充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)慢的(de)(de)(de)問題。

3、用充電寶

如果車(che)上(shang)沒有專門的usb充(chong)電口，又懶得(de)安裝車(che)載充(chong)電器(qi)，就可(ke)以直接使用移(yi)動電源給手機充(chong)電，也(ye)十分方便。