[wallot]

no chance to make 15 minutes with 5S 4000mah

If the track profile is right I can make 10 minutes with 3300mah and 15minutes with 5000mah if I dont push it too hard.

If we had 15minute mains as standard I would probably go for 5500mah hyperions to be sure and not to stress the batteries too much and it would make my truck quite heavy.

My truck is quite light - 4200grams with 3300mah and 4400g with 5000mah RTR. (my nitro mugen used to be little bit under 4500g rtr but with heavier wheels so I guess about 4400g with VTR prolines I run now and it just was not agile enough to my liking as my lighter BL truck)

With lighter batteries the truck handles much better except for tracks with very low traction where heavier batteries help with traction.

Hyperions G3 35C/65C 3300mah 5S have no problem pushing my mugen for 10 minutes. based on eagle tree data they are at similar level with 5000mah 30C/40C zippy flightmax

My Neu 1415 has about 10-15% less power consumption compared to Tekin T8 powered truck fellow racers run. Sure some of it is driving style as I am very smooth on throttle.

IMHO 15 minutes is too much unless you want to compromise on car handling or push batteries to the limit.