I had a 2s lipo with a deans plug on it. my other batteries are 3s with traxxas, and I just use a traxxas to deans adaptor when I charge them using a traxxas charger. I ended up using the deans end off one of my adaptors and splicing and soldering it onto what used to be the Tamiya plug on the tank. So now I have over twice the running time and quicker charging. I ran it for 30minutes starting at 8.4 volts and it only dropped to 8.2v. That means even though I don't have a low voltage alarm at the moment, i'll have plenty of time to check it using my meter and it won't be so easy to run into low voltage because I estimate it will be over an hour!. Yes its a tight fit but there it is.