For best performance, never use adapter plugs as the impedance of the added connectors seriously use up power. Just a fraction of an ohm can cause a severe voltage drop at high currents the motors require. Pick a good connector design and convert all your batteries and ESC's to use the same type. There will be some discussion of what is the best connector, there are three or four pretty good ones. See what the bulk of the flyers in your area use and go with the same ones.