應急(ji)充電(dian)(dian)(dian)器的用途主要是為(wei)(wei)了解決移動(dong)數碼(ma)產(chan)品(pin)的臨時電(dian)(dian)(dian)量不足問(wen)題(ti)，其工作原理，是通過(guo)鋰電(dian)(dian)(dian)池、太(tai)陽能板或(huo)者普通AA干電(dian)(dian)(dian)池作為(wei)(wei)儲電(dian)(dian)(dian)單元，經過(guo)合適的電(dian)(dian)(dian)壓轉換后，實現隨(sui)時、隨(sui)地、隨(sui)身為(wei)(wei)移動(dong)數碼(ma)產(chan)品(pin)供電(dian)(dian)(dian)或(huo)充電(dian)(dian)(dian)。

 應急充電器的(de)用途主(zhu)要是(shi)為了解決移動數碼產(chan)品的(de)臨時電量(liang)不足(zu)問題(ti)，其工作(zuo)原理，是(shi)通過鋰(li)電池、太陽(yang)能板(ban)或(huo)者普通AA干電池作(zuo)為儲(chu)電單(dan)元，經過合適的(de)電壓(ya)轉換(huan)后，實現隨(sui)時、隨(sui)地、隨(sui)身為移動數碼產(chan)品供電或(huo)充電。記者在市場調(diao)查(cha)中看到，常見(jian)的(de)應急充電器(qi)有(you)以(yi)下三類(lei)。

　　干電池式

　　干電(dian)(dian)(dian)(dian)池式應急(ji)充電(dian)(dian)(dian)(dian)器(qi)的工作原理是，將干電(dian)(dian)(dian)(dian)池裝(zhuang)入干電(dian)(dian)(dian)(dian)池供電(dian)(dian)(dian)(dian)裝(zhuang)置后，先由干電(dian)(dian)(dian)(dian)池為(wei)該(gai)裝(zhuang)置充電(dian)(dian)(dian)(dian)，充滿后，再由該(gai)裝(zhuang)置為(wei)數碼設備供電(dian)(dian)(dian)(dian)。在(zai)外出(chu)辦事(shi)或旅(lv)游(you)時，消費者可以隨(sui)身(shen)攜帶幾(ji)塊5號電(dian)(dian)(dian)(dian)池，便于隨(sui)時為(wei)上(shang)述供電(dian)(dian)(dian)(dian)裝(zhuang)置充電(dian)(dian)(dian)(dian)。盡管(guan)商家宣傳稱，經過上(shang)述供電(dian)(dian)(dian)(dian)裝(zhuang)置充電(dian)(dian)(dian)(dian)后，可支持手機通(tong)話兩個小時，但實際上(shang)，一般能支持通(tong)話十幾(ji)分鐘就相(xiang)當不錯了。

　　內(nei)置鋰電池式

　　內(nei)(nei)置鋰電(dian)(dian)(dian)池(chi)式(shi)應急充電(dian)(dian)(dian)器(qi)又(you)叫移動電(dian)(dian)(dian)源、便(bian)(bian)攜式(shi)充電(dian)(dian)(dian)器(qi)。它的工作原理是將鋰電(dian)(dian)(dian)池(chi)內(nei)(nei)置在充電(dian)(dian)(dian)裝(zhuang)置內(nei)(nei)，無需(xu)安裝(zhuang)電(dian)(dian)(dian)池(chi)，便(bian)(bian)可(ke)為數(shu)碼(ma)(ma)設備供(gong)電(dian)(dian)(dian)。該充電(dian)(dian)(dian)器(qi)的容量一般為800mAH―2000mAH，體積(ji)小巧，便(bian)(bian)于攜帶。目前，該充電(dian)(dian)(dian)器(qi)被廣泛(fan)應用于多種(zhong)數(shu)碼(ma)(ma)產品上。

　　太陽能式

　　太陽能式充電器是將太陽(yang)能轉換為電(dian)能后，存儲(chu)在(zai)(zai)蓄(xu)電(dian)池里，可為多種數(shu)碼產品充(chong)電(dian)。該(gai)充(chong)電(dian)器(qi)的特性跟內(nei)置鋰電(dian)池式充(chong)電(dian)器(qi)相似，但其對充(chong)電(dian)的條件要求較高(gao)，在(zai)(zai)強(qiang)光下不間斷地充(chong)電(dian)(直射太陽(yang)能面板)約8小時后，方可充(chong)滿，而隔著玻(bo)璃充(chong)電(dian)效果(guo)較差，在(zai)(zai)弱光下(如(ru)燈光)是不能進行充(chong)電(dian)的。