Thanks for the response Skellyo I guess I do not need to go 50 as I have my slash for just speed runs! I would be happy with 40 and a reliable run time the main thing that I want to do is not have to replace parts before the battery runs out. What would be realistic for 2s on speed? From what I have been reading and correct me if I am wrong, it would be better to get a higher rating on the C and would help protect the ESC.