Dangane da bukatun da'irar, zaɓi hanyar iska:
Lokacin zazzage na'urar caji mara igiyar waya, ya zama dole a ƙayyade hanyar juyawa bisa ga buƙatun da'irar na'urar caji mara waya, girman inductance na na'urar da girman coil, sannan a yi kyawu mai kyau.Wayoyin caji mara waya ta asali suna rauni daga ciki zuwa waje, don haka da farko ƙayyade girman diamita na ciki.Sannan ƙayyade adadin yadudduka, tsayi, da diamita na waje na nada bisa ga dalilai kamar inductance da juriya.