Thanks for the reply.. I have a decent watt meter .. I also am flying the eflite dueces wild with the high power setup.
That plane is running 2 60amp esc , 2 32 series motors and 2 4000mah 4 cell batteries and 12x8 props. When I watt meter
this plane I am at 1975 watts on 10lbs of plane.. so almost 200 watts per a lb. What I would like to do is try to use these batteries
or my 3500 mah 25 c 3 cell batteries.. but im not sure on weight and balance . It wont do me anygood to use larger batteries and add extra weight.. the trade off is not worth it. But then on the other side of the coin .. smaller batteries wont hold up to hard flying and will be shorter flight times. Im not looking for hard core 3d flight , but would like enough power for verticle climb and good aerobatics.

I dont know were the cg is with the batteries installed.. so I hoping these batteries will fit.. other wise I would have to buy new batteries.. I really dont want to invest in 5 cell units .. just for this plane.. I keep some cost down by cross using batteries.

Motor is on order and plane is asssembled .. so I will see were the cg ends up with my batteries. I guess I could double up 2 4 cell packs that might be a tad smaller in size .. mine are kinda long in length.

Do you have any info on battery location and size.. this always seems to be the hardest thing .. battery placement with regards to balance in weight and power .

thanks again

plane is nice kit .. little rough on instructions hope it flies as nice as it looks.