應急充電(dian)器的用途主要是為了解決移(yi)(yi)動數(shu)碼產(chan)品的臨時(shi)電(dian)量不足問題(ti)，其工作原(yuan)理，是通(tong)過鋰電(dian)池、太(tai)陽能板或者普(pu)通(tong)AA干電(dian)池作為儲電(dian)單元，經(jing)過合適的電(dian)壓轉換后，實現隨(sui)時(shi)、隨(sui)地、隨(sui)身為移(yi)(yi)動數(shu)碼產(chan)品供電(dian)或充電(dian)。

 應急充電器的用途(tu)主要是為了解決移(yi)動數(shu)碼產品(pin)(pin)的臨時電量不(bu)足(zu)問題，其工作(zuo)原理，是通過(guo)鋰電池、太陽(yang)能板(ban)或者普通AA干(gan)電池作(zuo)為儲電單元，經過(guo)合適的電壓(ya)轉換后，實現隨(sui)時、隨(sui)地(di)、隨(sui)身為移(yi)動數(shu)碼產品(pin)(pin)供電或充(chong)電。記者在(zai)市場調查中看到(dao)，常見的應急充(chong)電器有以下三類。

　　干電池式

　　干電(dian)(dian)(dian)(dian)池(chi)(chi)式應(ying)急充(chong)(chong)電(dian)(dian)(dian)(dian)器的工作(zuo)原理是(shi)，將干電(dian)(dian)(dian)(dian)池(chi)(chi)裝(zhuang)入干電(dian)(dian)(dian)(dian)池(chi)(chi)供(gong)電(dian)(dian)(dian)(dian)裝(zhuang)置后，先(xian)由干電(dian)(dian)(dian)(dian)池(chi)(chi)為該裝(zhuang)置充(chong)(chong)電(dian)(dian)(dian)(dian)，充(chong)(chong)滿后，再由該裝(zhuang)置為數碼(ma)設(she)備供(gong)電(dian)(dian)(dian)(dian)。在(zai)外(wai)出辦事或旅游時，消費者(zhe)可以隨身(shen)攜帶幾塊5號電(dian)(dian)(dian)(dian)池(chi)(chi)，便于隨時為上(shang)(shang)述(shu)供(gong)電(dian)(dian)(dian)(dian)裝(zhuang)置充(chong)(chong)電(dian)(dian)(dian)(dian)。盡管(guan)商家(jia)宣(xuan)傳(chuan)稱(cheng)，經過上(shang)(shang)述(shu)供(gong)電(dian)(dian)(dian)(dian)裝(zhuang)置充(chong)(chong)電(dian)(dian)(dian)(dian)后，可支持手機通話(hua)兩個小時，但實際(ji)上(shang)(shang)，一般能支持通話(hua)十幾分鐘就(jiu)相當不錯了。

　　內置(zhi)鋰電池式

　　內置(zhi)(zhi)鋰電(dian)池(chi)式應(ying)急充電(dian)器(qi)(qi)又(you)叫移動(dong)電(dian)源(yuan)、便攜式充電(dian)器(qi)(qi)。它的(de)工(gong)作(zuo)原理是將(jiang)鋰電(dian)池(chi)內置(zhi)(zhi)在(zai)充電(dian)裝置(zhi)(zhi)內，無需安裝電(dian)池(chi)，便可為(wei)數碼(ma)(ma)設備供電(dian)。該(gai)充電(dian)器(qi)(qi)的(de)容量一般為(wei)800mAH―2000mAH，體積(ji)小巧(qiao)，便于攜帶。目前，該(gai)充電(dian)器(qi)(qi)被廣泛應(ying)用于多種數碼(ma)(ma)產(chan)品上。

　　太陽能式

　　太陽能式充電器是將太陽(yang)能(neng)轉換為電(dian)(dian)能(neng)后，存(cun)儲在蓄電(dian)(dian)池里，可(ke)為多(duo)種數(shu)碼產品充(chong)(chong)電(dian)(dian)。該充(chong)(chong)電(dian)(dian)器(qi)的(de)特性跟內置(zhi)鋰電(dian)(dian)池式充(chong)(chong)電(dian)(dian)器(qi)相似，但其(qi)對充(chong)(chong)電(dian)(dian)的(de)條件要求較(jiao)高，在強光下不(bu)間斷地(di)充(chong)(chong)電(dian)(dian)(直(zhi)射(she)太陽(yang)能(neng)面板)約8小時后，方可(ke)充(chong)(chong)滿，而隔著(zhu)玻璃充(chong)(chong)電(dian)(dian)效果較(jiao)差，在弱光下(如燈光)是不(bu)能(neng)進行(xing)充(chong)(chong)電(dian)(dian)的(de)。