I have a 6000. I love it. I however switched over to a JRXS and now it won't fit. It's too bad, I love the LiPo. I may buy the type R JRX next summer. It's supposed to be LiPo friendly. All in all I am impressed with the MaxAmps battery. I do wish that the wires came out of the top, rather than the side. I could then run it in my buggy. As they evolve I hope that I can again use them.