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)池(chi)(chi)(chi)可以(yi)看這(zhe)幾點： 【1】選(xuan)購(gou)有“國(guo)家免(mian)檢”、“中國(guo)名(ming)牌(pai)”標(biao)(biao)(biao)志(zhi)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)產(chan)(chan)品和地方(fang)名(ming)牌(pai)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)產(chan)(chan)品，這(zhe)些產(chan)(chan)品質(zhi)量有一定的(de)(de)(de)(de)保障。【2】根據用(yong)電(dian)(dian)(dian)(dian)(dian)器具的(de)(de)(de)(de)要求，選(xuan)擇適(shi)用(yong)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)類型(xing)和規格尺寸，并根據用(yong)電(dian)(dian)(dian)(dian)(dian)器具耗電(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)(de)大小和特點，購(gou)買適(shi)合用(yong)電(dian)(dian)(dian)(dian)(dian)器具的(de)(de)(de)(de) 電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)。 【3】注(zhu)意查看電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)的(de)(de)(de)(de)生(sheng)產(chan)(chan)日期(qi)(qi)(qi)(qi)和保質(zhi)期(qi)(qi)(qi)(qi)，購(gou)買近期(qi)(qi)(qi)(qi)生(sheng)產(chan)(chan)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)（新電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)），新電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)性能好。 【4】注(zhu)意查看電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)的(de)(de)(de)(de)外(wai)觀，應(ying)(ying)選(xuan)購(gou)包裝(zhuang)精致(zhi)、外(wai)觀整(zheng)潔、干凈，無漏液跡(ji)象(xiang)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)。【5】注(zhu)意電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)的(de)(de)(de)(de)標(biao)(biao)(biao)志(zhi)，電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)商(shang)標(biao)(biao)(biao)上應(ying)(ying)標(biao)(biao)(biao)明(ming)生(sheng)產(chan)(chan)廠名(ming)、電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)極性、電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)型(xing)號、標(biao)(biao)(biao)稱電(dian)(dian)(dian)(dian)(dian)壓、商(shang)標(biao)(biao)(biao)等；銷售包裝(zhuang)上（如2只(zhi)熱縮(suo)(suo)或(huo)4只(zhi)熱縮(suo)(suo)，或(huo)吊牌(pai)掛(gua)卡）應(ying)(ying)有中文廠址(zhi)、生(sheng)產(chan)(chan)日期(qi)(qi)(qi)(qi)和保質(zhi)期(qi)(qi)(qi)(qi)或(huo)標(biao)(biao)(biao)明(ming)保質(zhi)期(qi)(qi)(qi)(qi)的(de)(de)(de)(de)截止期(qi)(qi)(qi)(qi)限(xian)、執行標(biao)(biao)(biao)準(zhun)的(de)(de)(de)(de)編號。購(gou)買堿性鋅錳電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)時應(ying)(ying)看型(xing)號有無ALKALINE或(huo)LR字樣。 【6】由于(yu)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)中的(de)(de)(de)(de)汞(gong)對環境(jing)有害(hai)，為了保護環境(jing)，在購(gou)買時應(ying)(ying)選(xuan)用(yong)商(shang)標(biao)(biao)(biao)上標(biao)(biao)(biao)有“無汞(gong)”、“0%汞(gong)”、“不添加汞(gong)”字樣的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)。