應急充電(dian)(dian)(dian)器(qi)的(de)用途(tu)主要是(shi)為(wei)(wei)了解決移(yi)動數(shu)(shu)碼(ma)產品的(de)臨(lin)時電(dian)(dian)(dian)量不足問題(ti)，其(qi)工作(zuo)原理，是(shi)通過鋰電(dian)(dian)(dian)池、太(tai)陽能板(ban)或者普通AA干電(dian)(dian)(dian)池作(zuo)為(wei)(wei)儲電(dian)(dian)(dian)單元，經過合適的(de)電(dian)(dian)(dian)壓轉換(huan)后，實現(xian)隨時、隨地、隨身為(wei)(wei)移(yi)動數(shu)(shu)碼(ma)產品供電(dian)(dian)(dian)或充電(dian)(dian)(dian)。

 應急充電器的(de)用途主要是為(wei)了解決移動數碼產(chan)品的(de)臨時(shi)電(dian)(dian)量不足問題，其工作原理，是通過鋰(li)電(dian)(dian)池、太陽能板或(huo)者普(pu)通AA干電(dian)(dian)池作為(wei)儲電(dian)(dian)單元，經(jing)過合適的(de)電(dian)(dian)壓轉(zhuan)換后(hou)，實現(xian)隨(sui)時(shi)、隨(sui)地、隨(sui)身(shen)為(wei)移動數碼產(chan)品供(gong)電(dian)(dian)或(huo)充(chong)電(dian)(dian)。記者在市場調查中看到(dao)，常(chang)見的(de)應急充(chong)電(dian)(dian)器(qi)有以下三(san)類(lei)。

　　干電池式

　　干(gan)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)式應急充電(dian)(dian)(dian)(dian)(dian)器的工(gong)作原理(li)是，將干(gan)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)裝(zhuang)(zhuang)入(ru)干(gan)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)供(gong)電(dian)(dian)(dian)(dian)(dian)裝(zhuang)(zhuang)置(zhi)(zhi)(zhi)后，先由干(gan)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)為(wei)該裝(zhuang)(zhuang)置(zhi)(zhi)(zhi)充電(dian)(dian)(dian)(dian)(dian)，充滿(man)后，再(zai)由該裝(zhuang)(zhuang)置(zhi)(zhi)(zhi)為(wei)數碼設備(bei)供(gong)電(dian)(dian)(dian)(dian)(dian)。在外(wai)出(chu)辦(ban)事或旅游時，消費(fei)者(zhe)可以(yi)隨身攜帶幾(ji)塊5號(hao)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)，便于隨時為(wei)上述(shu)供(gong)電(dian)(dian)(dian)(dian)(dian)裝(zhuang)(zhuang)置(zhi)(zhi)(zhi)充電(dian)(dian)(dian)(dian)(dian)。盡管商家宣傳(chuan)稱，經(jing)過上述(shu)供(gong)電(dian)(dian)(dian)(dian)(dian)裝(zhuang)(zhuang)置(zhi)(zhi)(zhi)充電(dian)(dian)(dian)(dian)(dian)后，可支(zhi)持(chi)手(shou)機通話兩(liang)個(ge)小時，但實(shi)際上，一般能支(zhi)持(chi)通話十幾(ji)分鐘(zhong)就相(xiang)當不錯了。

　　內置鋰(li)電池(chi)式

　　內置鋰電(dian)(dian)池(chi)(chi)式(shi)應(ying)(ying)急(ji)充(chong)電(dian)(dian)器(qi)又叫移動電(dian)(dian)源、便(bian)攜式(shi)充(chong)電(dian)(dian)器(qi)。它的(de)工作原理是將鋰電(dian)(dian)池(chi)(chi)內置在充(chong)電(dian)(dian)裝(zhuang)置內，無需安(an)裝(zhuang)電(dian)(dian)池(chi)(chi)，便(bian)可(ke)為數(shu)碼(ma)設備(bei)供電(dian)(dian)。該充(chong)電(dian)(dian)器(qi)的(de)容量一般為800mAH―2000mAH，體積(ji)小巧，便(bian)于攜帶。目前，該充(chong)電(dian)(dian)器(qi)被廣泛應(ying)(ying)用于多種數(shu)碼(ma)產品上(shang)。

　　太陽能式

　　太陽能式充電器是將(jiang)太(tai)陽(yang)能(neng)轉換為(wei)(wei)電(dian)能(neng)后，存儲在(zai)蓄電(dian)池里，可為(wei)(wei)多種(zhong)數(shu)碼產品充電(dian)。該充電(dian)器的特性跟內置鋰電(dian)池式充電(dian)器相似(si)，但其對(dui)充電(dian)的條件要求(qiu)較高(gao)，在(zai)強光(guang)下不(bu)間斷地充電(dian)(直(zhi)射太(tai)陽(yang)能(neng)面板)約(yue)8小時后，方可充滿，而隔著玻璃充電(dian)效果較差(cha)，在(zai)弱光(guang)下(如(ru)燈光(guang))是不(bu)能(neng)進行(xing)充電(dian)的。