I don't know anything about the trakpower packs, but I do have a couple of the maxamps 6Ah 4S packs. We ran them in a converted Losi 8ight that had a Feigao 8XL with a MM ESC geared 16/46, and when my buddy got really aggressive with running the buggy, the batteries got HOT. Over 150F. I don't know how much current was moving, but the batts couldn't keep up. I also run the 6Ah 4S packs in my buggy with the 7XL geared 14/46, but I've never heated the batts up like that. On the other hand, I don't dog my buggy like he does.