Capacitor na lantarki nau'i ne na capacitor wanda ke amfani da electrolyte a matsayin ɗaya daga cikin farantinsa don cimma babban ƙarfin ƙarfin fiye da yadda zai yiwu tare da capacitor maras amfani. Yawanci ya ƙunshi faranti guda biyu na ƙarfe, ɗaya daga cikinsu an lulluɓe shi da Layer Oxide, wanda Layer na electrolyte ya rabu. Lokacin da aka yi amfani da wutar lantarki akan capacitor, ana ƙirƙirar filin lantarki a cikin electrolyte, wanda ke haifar da haɓakar caji akan faranti. Wannan yana bawa capacitor damar adana makamashin lantarki, wanda za'a iya saki lokacin da ake buƙata. Ana amfani da masu ƙarfin lantarki da yawa a cikin da'irori na lantarki don tacewa, kewayawa, da sigina.