I have 2 turnigy 2s 5000mah 20c batteries and 2 hobby people 2s 5000mah 35c batteries and they both get extremely hot and a bit puffy when ever I use them. The motor and esc stay fairly cool. I have traxxas connectors and they are barely warm if warm at all. The only things that get hot are the batteries. What could be causing this and what can I do to fix it?
thanks