User blog comment:GraveEclipse567/Chaos Emeralds and their 'infinite' energy./@comment-26376509-20150524114218

here is how it works by what i can gather

the emiralds do have infinite energy but theay can only produce so moutch at one time

this means that sonic needs the seven beouse the energy output of one or more is insuffishent for a super transformaction this applyes to all aspiects of theair use so a robot cannot take more energy than the emrilds can give at one time