Those C rating are fake. Some battery matchers have cycled those packs at 35amp and compared the IR and avg voltage to other 65-80c packs, and the those imaginary 100+ c rating packs were not better. There is no standard for calculating the "C". Without a standard you cant really compare across brands. You probably wont believe any of this and then go buy those 100+ c packs, but you cant say you were not told...