jim , the advantage of the battery power is the headsets can be moved to different airplanes they dont even have to be plugged into an airplane for the anr work . the down side of that is if you dont replace the batteries regularly the anr will stop working while your flying and scare the crap out of you . then you have to fumble around finding and replacing batteries while your trying to fly . or the worst case is that your wife will mix old batteries with the new batteries and when your headset anr doesnt work you send it back to lightspeed for repair for no reason . if you always use the headsets in the same plane , the panel power is the way to go , you never have to worry about batteries .