I first clipped the Traxxas plugs and installed Deans connectors on the provided NiMH batteries and on the boat as my charger and LIPO's have Deans connectors. I charged the NiMH batteries and ran the boat. It last about 6 minutes and the batteries were so hot I could not touch them. The stickers on the batteries actually wrinkled. The boat seemed to go about 30 mph which is right for the stock batteries. I charged my 2 3s lipo batteries and set the ESC to the low voltage detection setting. The boat went even slower on 6s! They are brand new 5500mah 35-70C. There is nothing wrong with the batteries. I also tried another set of 3s and it was still slow. Any ideas why the Nimh batteries got so hot and didn't last long? What would be the cause of it being so slow on 6s when it is suppose to go 50+mph??? This boat is brand new and I just got it yesterday.