Kayayyakin wutar lantarki na AC zuwa DC da kuma kayayyakin wutar lantarki na DC zuwa DC suna da amfani daban-daban a aikace-aikace daban-daban. Ana amfani da kayayyakin wutar lantarki na AC/DC a cikin kayan aikin gida, na'urorin lantarki, da kwamfutoci waɗanda ke buƙatar wutar lantarki ta DC.
A gefe guda kuma, ana amfani da wutar lantarki ta DC zuwa DC a cikin motocin lantarki, na'urorin hasken rana, da na'urorin sadarwa marasa waya waɗanda ke buƙatar matakan ƙarfin lantarki daban-daban ko na yanzu. Kayayyakin wutar lantarki na AC zuwa DC da kuma wutar lantarki ta DC kai tsaye suna taka muhimmiyar rawa a cikin tsarin wutar lantarki, wanda ke ba mu damar samar da wutar lantarki mai ɗorewa da aminci a ƙarƙashin buƙatun wutar lantarki daban-daban.