Letme see if i understand? That is the only pack they have that is rated 20c? If that is what you are saying, I would have to disagree.
I could be wrong, but recently on the RCM maxamps forum someone asked if Maxamps was going to start making any 20C batts and they replied that they currently did, but they were the 2100/4200 model only. Maybe I misunderstood.