With this SBec switching regulator from JetiModels, it is possible to supply your receiver and servos directly from the flight battery with the necessary voltage and current. With an impressive 12A peak current, the SBec works with 2-10S LiXX batteries and can output a selectable voltage of 5-8V. Hacker, for example, uses it in their factory helicopters to replace the bulky and heavy receiver battery.