Adadin da ke kan mai sarrafa wutar lantarkinmu yana canzawa saboda yana nuna ainihin ƙarfin lantarki.Gabaɗaya, mai sarrafa wutar lantarki na iya daidaita ƙarfin wutar lantarki, amma yana da wahala kusan duk masu sarrafa wutar lantarkin lokaci-lokaci su kiyaye ƙarfin lantarki a matakin ɗaya koyaushe.Dole ne a sami wasu asarar wutar lantarki yayin duk aikin.Kamar dumama yana haifar da asarar wuta.Kodayake wasu masu sarrafa wutar lantarki na masana'antun ba za su canza ba, sun tsara wasu shirye-shirye don kiyaye adadi ba canzawa.