Well this is what happened yes i'm just starting out in this electric stuff BUT i called Max Amps twice first man talked to said he recommened a 2s pack said it would be plenty for my application then i called back next person talked to said a 4s pack but he said it's just your preference no one said that 2s lipo is junk for CC 2200 until now so i'm screwed wish i could remeber there names i also just called back to see if i get a third different awnser from calling talked to Josh he was great i will be going with the 6500 4s2s so is this going to work and now i read what you said in return's now i have to pay extra %20 for restocking i wish i would have found this thread first instead of calling because im trusting you to many on here say good things about you