I have a T Rex 600cf by Align. The motor,speed control and bec are all origional from the kit. I have two batteries. Both are 5,000 mAh. One is Thunder power and the other is a Flight Power. I am getting 4 minuets of flight time on eather battery. I am wondering what flight times you are experiencing? the voltage per cell after 4 minuets is usually 3.75 volts. 3D vs general flight will us about 400 more mAh to charge.
Thanks
Mike

I am using the TP and Evo25 and sport fly 6-7 minutes and will put back 3500 to 4000 mah. The lowest vt at start chg has been 21.37(7.5 minute flight), I have been pushing these batterys to learn where the line is, it seems to be around 6-6.5 miutes for sport flying, when I start pushing I drop back to 5-5.5 minutes. Hard 3-D will be back to 5 minutes max. so far, with 15 cycles the batterys are 100 %, that may change into the future. The 600 is stock from Align. I have 5 paks and use both the TP1010 and TP610 chargers with balancers.

Hi,
I recieved a reply from Flightpower. Steve from Flight Power stated that with a EV25 V-power rated at 25 C 5,000mAh 6s 22.2 volts willl be expected to give about 5 minuets of "sport " flying time using about 3,500 mAh.
MIke

I have 5350 and i fly 6 min. no 3d stuff.,i only put back about 2376.

That sound great. Do you know what the head speed is? I think my head speed is 1600 rpm in general flight and 2000rpm in 3D.
Mike