Bill - lingo is like this 3S means 3 cells in SERIES, 2P means 2 cells PARALLEL, hence 3S2P would be a 6 battery set up, 3 in SERIES 2 PARALLEL. Usually you need a software like MOTORCALC to calculate the set up (battery/prop/gearing). I think your park flyer will only be drawing about 6A-7A but go for the ICS480 please ...