電池（Battery）指盛有電解質溶液和金屬電極以產生電流的杯、槽或其他容器或復合容器的部分空間，能將化學能轉化成電能的裝置。具有正極、負極之分。隨著科技的進步，電池泛指能產生電能的小型裝置。如太陽能電池。電池的性能參數主要有電動勢、容量、比能量和電阻。利用電池作為能量來源，可以得到具有穩定電壓，穩定電流，長時間穩定供電，受外界影響很小的電流，并且電池結構簡單，攜帶方便，充放電操作簡便易行，不受外界氣候和溫度的影響，性能穩定可靠，在現代社會生活中的各個方面發揮有很大作用。

選(xuan)購(gou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)可以看(kan)這幾點： 【1】選(xuan)購(gou)有(you)“國(guo)家免檢”、“中國(guo)名牌(pai)”標(biao)志(zhi)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)產(chan)品(pin)和(he)地(di)方名牌(pai)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)產(chan)品(pin)，這些(xie)產(chan)品(pin)質量(liang)有(you)一定(ding)的(de)(de)(de)保(bao)障。【2】根據用(yong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器具(ju)的(de)(de)(de)要求，選(xuan)擇適(shi)用(yong)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)類型和(he)規格尺(chi)寸，并根據用(yong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器具(ju)耗電(dian)(dian)(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)大(da)小和(he)特點，購(gou)買適(shi)合用(yong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器具(ju)的(de)(de)(de) 電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)。 【3】注意查看(kan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)的(de)(de)(de)生(sheng)產(chan)日期和(he)保(bao)質期，購(gou)買近期生(sheng)產(chan)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)（新電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)），新電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)性(xing)能好。 【4】注意查看(kan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)的(de)(de)(de)外(wai)觀(guan)，應選(xuan)購(gou)包裝(zhuang)精(jing)致、外(wai)觀(guan)整潔、干凈(jing)，無(wu)(wu)漏(lou)液(ye)跡象的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)。【5】注意電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)的(de)(de)(de)標(biao)志(zhi)，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)商(shang)標(biao)上應標(biao)明生(sheng)產(chan)廠(chang)名、電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)極性(xing)、電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)型號、標(biao)稱電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)、商(shang)標(biao)等(deng)；銷售包裝(zhuang)上（如2只(zhi)熱縮或(huo)4只(zhi)熱縮，或(huo)吊牌(pai)掛卡）應有(you)中文廠(chang)址(zhi)、生(sheng)產(chan)日期和(he)保(bao)質期或(huo)標(biao)明保(bao)質期的(de)(de)(de)截(jie)止(zhi)期限、執(zhi)行標(biao)準的(de)(de)(de)編號。購(gou)買堿性(xing)鋅錳電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)時應看(kan)型號有(you)無(wu)(wu)ALKALINE或(huo)LR字樣。 【6】由于(yu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)中的(de)(de)(de)汞對(dui)環境有(you)害，為了保(bao)護環境，在購(gou)買時應選(xuan)用(yong)商(shang)標(biao)上標(biao)有(you)“無(wu)(wu)汞”、“0%汞”、“不添(tian)加汞”字樣的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)。