A 4S1P is the way to go on this plane. 2500 to 3700ma cells like polyquest or hyperion lvx 9/11 minute flights.
620 to 750 watts on 4s
here is a link to a hyp 3700 pack that would work well http://www.allerc.com/product_info.p...oducts_id=2064

$168.00

at this point a TP 4s2p4200 pack is old school

TP extremes would be good too