I just purchased my Revo 3.3 off craigslist a week ago and the guy told me all I needed to do was replaced the Receiver. I replaced the receiver and now after I charged the batteries, I will plug the ez-start into the port and the lights on the ez-start will not light up. I will pull it out and push the button and the lights will light up. AFter I insert it back in, the lights will not light up again. The voltage on the 7.2 battery will not go above 5.4V. I am thinking there are more electrical problems than I can think of but I am taking them one at a time. If anybody has any kind of advance it would be greatly appreciated.