Alright I bought a mini e revo brushless off of a friend that had about three runs on it. I ran it about 4 times while waiting on some upgrade parts. When my rpm stuff came I put it in the car decided to drive it again ran fine using 2 of the stock batteries for the first run. I then waited a little bit and ran a second set of batteries and did not get alot of runtime out of it and one of the batteries was too hot to handle. I put that battery aside and put the car up for a couple of weeks. I just got it down the other day and decided to run a 2cell lipo. I set it up for lipo and started to run it and it went into low voltage cutoff within the first 2minutes of running and my lipo was warn not hot just warm. I called traxxas and asked because I was reading where some have had that problem. He said he was not aware of that issue and to take the motor off and check for anything binding. I cannot see anything that was binding to cause batteries to heat up like that. Is it safe to say my esc is going south. Thanks for any help.