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)購電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)可以看(kan)這(zhe)幾點： 【1】選(xuan)購有(you)(you)“國家免檢”、“中(zhong)國名(ming)(ming)牌”標志的(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)產品(pin)和(he)地方名(ming)(ming)牌電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)產品(pin)，這(zhe)些(xie)產品(pin)質(zhi)(zhi)量有(you)(you)一定(ding)的(de)(de)(de)(de)(de)(de)保(bao)障(zhang)。【2】根(gen)據(ju)用(yong)電(dian)(dian)(dian)器(qi)具(ju)的(de)(de)(de)(de)(de)(de)要(yao)求，選(xuan)擇適(shi)用(yong)的(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)類(lei)型和(he)規(gui)格尺(chi)寸，并(bing)根(gen)據(ju)用(yong)電(dian)(dian)(dian)器(qi)具(ju)耗電(dian)(dian)(dian)的(de)(de)(de)(de)(de)(de)大(da)小和(he)特點，購買適(shi)合用(yong)電(dian)(dian)(dian)器(qi)具(ju)的(de)(de)(de)(de)(de)(de) 電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)。 【3】注意(yi)查看(kan)電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)的(de)(de)(de)(de)(de)(de)生產日期(qi)(qi)(qi)(qi)(qi)和(he)保(bao)質(zhi)(zhi)期(qi)(qi)(qi)(qi)(qi)，購買近期(qi)(qi)(qi)(qi)(qi)生產的(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)（新電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)），新電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)性能好。 【4】注意(yi)查看(kan)電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)的(de)(de)(de)(de)(de)(de)外觀，應(ying)(ying)(ying)選(xuan)購包裝精致、外觀整潔、干凈(jing)，無(wu)(wu)漏液跡(ji)象的(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)。【5】注意(yi)電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)的(de)(de)(de)(de)(de)(de)標志，電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)商標上應(ying)(ying)(ying)標明生產廠(chang)名(ming)(ming)、電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)極性、電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)型號(hao)、標稱電(dian)(dian)(dian)壓、商標等；銷(xiao)售包裝上（如2只熱(re)縮(suo)或(huo)4只熱(re)縮(suo)，或(huo)吊(diao)牌掛卡）應(ying)(ying)(ying)有(you)(you)中(zhong)文廠(chang)址、生產日期(qi)(qi)(qi)(qi)(qi)和(he)保(bao)質(zhi)(zhi)期(qi)(qi)(qi)(qi)(qi)或(huo)標明保(bao)質(zhi)(zhi)期(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)(de)(de)(de)截止(zhi)期(qi)(qi)(qi)(qi)(qi)限(xian)、執行標準的(de)(de)(de)(de)(de)(de)編號(hao)。購買堿(jian)性鋅錳電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)時應(ying)(ying)(ying)看(kan)型號(hao)有(you)(you)無(wu)(wu)ALKALINE或(huo)LR字樣(yang)(yang)。 【6】由于電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)中(zhong)的(de)(de)(de)(de)(de)(de)汞(gong)對環境有(you)(you)害(hai)，為了保(bao)護(hu)環境，在(zai)購買時應(ying)(ying)(ying)選(xuan)用(yong)商標上標有(you)(you)“無(wu)(wu)汞(gong)”、“0%汞(gong)”、“不添加汞(gong)”字樣(yang)(yang)的(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)。