I use the Zippy compact, they are lighter and smaller than many alternatives. 1000 mah 2s if the videotx allows low voltage supply or 3s if the videotx needs the high voltage, i go straight to the videotx but always have a voltage regulator before rx, servos and skyline. As i use the xt60 connector as a main power supply i converted the gimbal circuit and batteries to jst connector.
Reading back it sounds like complicating things...maybe it is, maybe not :tennis: