I've done a lot of searching here and elsewhere but can't find a direct answer to my query. I understand ( from media sources) that the Dreamliner relies more heavily on battery power than other jets. This is because some hydraulic systems have been replaced with lighter electronic alternatives. I read on one media outlet that electronics have replaced hydraulic systems but this isn't correct as we know.
Am I correct in assuming that extra battery power is required to operate lesser hydraulic systems such as actuators etc????......and.......has Boeing cut out a substantial amount of weight by "upgrading" these systems?