應急充電(dian)器的(de)(de)用途(tu)主要是(shi)(shi)為了(le)解決移動數(shu)(shu)碼產品(pin)的(de)(de)臨時電(dian)量不(bu)足問題，其(qi)工(gong)作原理，是(shi)(shi)通過(guo)鋰電(dian)池、太陽能板(ban)或者普通AA干電(dian)池作為儲電(dian)單元，經過(guo)合(he)適的(de)(de)電(dian)壓轉換(huan)后，實現隨(sui)時、隨(sui)地、隨(sui)身為移動數(shu)(shu)碼產品(pin)供電(dian)或充電(dian)。

 應急充電器的用(yong)途(tu)主要(yao)是為(wei)了解決移(yi)動數(shu)(shu)碼(ma)產(chan)(chan)品(pin)的臨(lin)時電(dian)(dian)量不足問題，其(qi)工作原理(li)，是通過鋰電(dian)(dian)池(chi)、太陽能板或(huo)者普通AA干電(dian)(dian)池(chi)作為(wei)儲電(dian)(dian)單元，經過合(he)適的電(dian)(dian)壓轉(zhuan)換后(hou)，實現隨(sui)時、隨(sui)地、隨(sui)身為(wei)移(yi)動數(shu)(shu)碼(ma)產(chan)(chan)品(pin)供電(dian)(dian)或(huo)充(chong)電(dian)(dian)。記者在市(shi)場調查中看到，常見的應(ying)急充(chong)電(dian)(dian)器有以下(xia)三類(lei)。

　　干電池式

　　干(gan)(gan)(gan)電(dian)(dian)(dian)(dian)池(chi)式應急充電(dian)(dian)(dian)(dian)器的工(gong)作原理是，將干(gan)(gan)(gan)電(dian)(dian)(dian)(dian)池(chi)裝入干(gan)(gan)(gan)電(dian)(dian)(dian)(dian)池(chi)供(gong)(gong)電(dian)(dian)(dian)(dian)裝置(zhi)后，先由干(gan)(gan)(gan)電(dian)(dian)(dian)(dian)池(chi)為該裝置(zhi)充電(dian)(dian)(dian)(dian)，充滿后，再由該裝置(zhi)為數碼設備供(gong)(gong)電(dian)(dian)(dian)(dian)。在外出辦事或旅游時，消(xiao)費者(zhe)可(ke)以隨(sui)身(shen)攜帶幾(ji)塊5號電(dian)(dian)(dian)(dian)池(chi)，便于(yu)隨(sui)時為上(shang)述(shu)供(gong)(gong)電(dian)(dian)(dian)(dian)裝置(zhi)充電(dian)(dian)(dian)(dian)。盡管商(shang)家宣傳(chuan)稱，經過上(shang)述(shu)供(gong)(gong)電(dian)(dian)(dian)(dian)裝置(zhi)充電(dian)(dian)(dian)(dian)后，可(ke)支持手機通(tong)(tong)話(hua)兩個小時，但實際(ji)上(shang)，一般能支持通(tong)(tong)話(hua)十(shi)幾(ji)分鐘就相當不(bu)錯了。

　　內置(zhi)鋰電(dian)池(chi)式

　　內置(zhi)鋰(li)電(dian)(dian)池式應急充(chong)電(dian)(dian)器(qi)(qi)又叫移動(dong)電(dian)(dian)源、便攜(xie)式充(chong)電(dian)(dian)器(qi)(qi)。它的工作原理是將鋰(li)電(dian)(dian)池內置(zhi)在充(chong)電(dian)(dian)裝置(zhi)內，無需安裝電(dian)(dian)池，便可為數碼設備供電(dian)(dian)。該充(chong)電(dian)(dian)器(qi)(qi)的容量一般為800mAH―2000mAH，體積小巧，便于攜(xie)帶。目前，該充(chong)電(dian)(dian)器(qi)(qi)被(bei)廣泛應用于多種數碼產品上(shang)。

　　太陽能式

　　太陽能式充電器是(shi)(shi)將(jiang)太陽能(neng)(neng)轉換為電(dian)能(neng)(neng)后，存(cun)儲在蓄電(dian)池里，可為多種(zhong)數碼產品充(chong)(chong)電(dian)。該充(chong)(chong)電(dian)器(qi)的(de)特性跟內(nei)置鋰(li)電(dian)池式充(chong)(chong)電(dian)器(qi)相似(si)，但其對充(chong)(chong)電(dian)的(de)條件要求較高，在強光(guang)下(xia)不(bu)間斷地充(chong)(chong)電(dian)(直射太陽能(neng)(neng)面板)約8小時后，方(fang)可充(chong)(chong)滿，而隔著玻璃充(chong)(chong)電(dian)效果較差，在弱光(guang)下(xia)(如燈光(guang))是(shi)(shi)不(bu)能(neng)(neng)進行充(chong)(chong)電(dian)的(de)。