3 ms·flywheels are batteries, of a different kind (and density) than lithium or lead ones.by GeoAtreides 1y agoflywheels are batteries, of a different kind (and density) than lithium or lead ones.vel0city 1y agoThey're usually almost more capacitators than they are batteries from an electrical standpoint. They're there to rapidly smooth out the smaller jitters.loeg 1y agoYou know what he meant. Respond to the charitable interpretation of the comment, etc.