Ok I have I charger 406 duo with power supply big enough to max it out. I just got 2 4s 5.6 amp hour 60c lipos. What should be my max charge rate? I have them on a safe 40amp paraboard. I'm cycling them right now at 2c and 11.2 amp hours being they're doubled up in parallel. My I charger seems to be struggling? The fans haven't stopped. Am I doing something wrong? Please help! Thanks for your time, Zach