應急充電(dian)器的用途主要(yao)是(shi)為(wei)了(le)解(jie)決移(yi)動數碼產品(pin)(pin)的臨時電(dian)量不足問題(ti)，其工作原(yuan)理，是(shi)通過(guo)鋰電(dian)池(chi)(chi)、太(tai)陽能板或(huo)者(zhe)普(pu)通AA干電(dian)池(chi)(chi)作為(wei)儲(chu)電(dian)單(dan)元，經(jing)過(guo)合(he)適的電(dian)壓轉換后，實現隨(sui)(sui)時、隨(sui)(sui)地、隨(sui)(sui)身為(wei)移(yi)動數碼產品(pin)(pin)供(gong)電(dian)或(huo)充電(dian)。

 應急充電器的(de)(de)用途(tu)主要是為(wei)了解決(jue)移(yi)動數碼(ma)產品(pin)(pin)的(de)(de)臨時電量不(bu)足問題，其工作原理，是通(tong)過(guo)鋰電池(chi)、太陽能板或者普通(tong)AA干(gan)電池(chi)作為(wei)儲(chu)電單元(yuan)，經過(guo)合(he)適的(de)(de)電壓轉換后，實現隨(sui)(sui)時、隨(sui)(sui)地、隨(sui)(sui)身為(wei)移(yi)動數碼(ma)產品(pin)(pin)供電或充電。記(ji)者在市場(chang)調查中看到，常見(jian)的(de)(de)應(ying)急(ji)充電器有(you)以(yi)下三類(lei)。

　　干電池式

　　干(gan)(gan)電池(chi)式(shi)應急充(chong)電器的工作原理是，將干(gan)(gan)電池(chi)裝入干(gan)(gan)電池(chi)供(gong)電裝置(zhi)(zhi)后，先由干(gan)(gan)電池(chi)為該裝置(zhi)(zhi)充(chong)電，充(chong)滿(man)后，再(zai)由該裝置(zhi)(zhi)為數(shu)碼設備供(gong)電。在外出辦事或(huo)旅(lv)游時(shi)，消(xiao)費(fei)者可以隨(sui)(sui)身攜帶幾塊5號電池(chi)，便(bian)于隨(sui)(sui)時(shi)為上述供(gong)電裝置(zhi)(zhi)充(chong)電。盡(jin)管(guan)商家宣傳稱，經(jing)過上述供(gong)電裝置(zhi)(zhi)充(chong)電后，可支持手機(ji)通話(hua)兩個(ge)小(xiao)時(shi)，但實際上，一(yi)般能支持通話(hua)十幾分鐘就相當不錯了(le)。

　　內(nei)置鋰電池(chi)式

　　內(nei)置(zhi)鋰電(dian)池(chi)式應急充(chong)(chong)電(dian)器又(you)叫移動電(dian)源(yuan)、便攜(xie)式充(chong)(chong)電(dian)器。它(ta)的(de)工作原理是將鋰電(dian)池(chi)內(nei)置(zhi)在充(chong)(chong)電(dian)裝(zhuang)置(zhi)內(nei)，無需安裝(zhuang)電(dian)池(chi)，便可為(wei)(wei)數碼設備供電(dian)。該充(chong)(chong)電(dian)器的(de)容量一般為(wei)(wei)800mAH―2000mAH，體積(ji)小(xiao)巧，便于(yu)攜(xie)帶。目前，該充(chong)(chong)電(dian)器被(bei)廣泛應用(yong)于(yu)多(duo)種數碼產品上。

　　太陽能式

　　太陽能式充電器是將太陽能(neng)轉換為電(dian)(dian)(dian)能(neng)后(hou)，存儲在蓄電(dian)(dian)(dian)池里(li)，可為多種數(shu)碼產品充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)。該充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)器的特性跟內置鋰電(dian)(dian)(dian)池式充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)器相似，但其對充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)的條(tiao)件要求較(jiao)高，在強光(guang)下不(bu)間斷地(di)充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(直射太陽能(neng)面板)約8小時后(hou)，方可充(chong)(chong)(chong)(chong)滿，而隔(ge)著玻璃(li)充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)效果較(jiao)差，在弱光(guang)下(如燈光(guang))是不(bu)能(neng)進行充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)的。