Finally got my 3S/6000/25C NanoTech lipos in last week. I'm amazed at the performance. I'm getting 20 to 25 min run times at mostly WOT and the POWA is unreal. These babies have serious punch all the way down to LVC, absolutely no swelling, and around 110 deg F after a hard run. With a 5C charge rate, it would take a 30 AMP charger to fill up 1 of these at full C rate; that's just crazy. My truck is running considerably faster on 16/47 gearing with the Nanos than it was on 18/47 with my 3S/5000/30C Zippys. This is not really a fair comparison because the Zippys had been rode hard and put to bed wet for the last 14 months, but I'm still surprised there is that big of a difference.
Odd thing about the Nanotechs is that they are not as consistent in run time from lipo to lipo as the Zippys were. Luckily only 2 of the 6 I bought turned out to be quicker burns (20 vs 25 min) than the other 4 so I'll just pair them up. Even the 2 lipos with the shortest run time lasted for 5 min longer than my Zippys did when new, so I'm happy!
Another cool thing about the new batts is that my motor and ESC now run cooler. ESC fan isn't on near as much and the motor is down to around 130 deg max (that's after running hard for 25 min in the sand). I guess the Zippys couldn't keep up with the power demands of this beast.