with the electra which will fly off of 6 cell packs , its not too expensive to get two packs and by the time you land (10 min to 30 min later- thermals!) the packs are cool enough plus you DON'T need electric outlets -car battery works fine for several flights no problem with smaller jobs. the Super star would require larger packs or lipos for really good endurance. gas would be better for easier endurance for a 4 ch plane.