truerc packs do what they say. It is a solid 10C, if not higher, pack. I've been running my 5S2P 8Ah pack in my 13lb muggy with a Compro controller and Feigao 8XL. The truck is stupid fast for something so big and heavy. Controller gets to about 150, motor about 180, the battery, I didn't even temp it, because was only barely warm.

The maxamps pack 4S2P is a nice pack. I have a few of them, but they are the older non copper tab cell packs. As I said, they are nice packs, but I don't know about the ones I have being true 20C packs. For some reason, we were able to heat these packs up pretty good, but not over the max recommended temp. I can't explain why these heated up the way they did, when the truerc pack runs so cool in a hotter setup. I believe that the new packs made from the copper tab cells are better than the ones I have.

I've been using Kokams and Polyquest packs for my 4S setups and the truerc packs for my 5S setup. I just wouldn't use the truerc packs in a setup that would demand a bunch of current. BTW, the 5S2P 8Ah pack won't even come close to fitting in my buggy with the body on.