Regarding a 8cell 9.6v nimh 5000mah and a 2s lipo. The 9.6v nimh has more speed and acceleration compared to the 2s lipo. In my opinion if you are going with the 2s you might as well go with this nimh. Which is safer. I mean why go half way just get the 3s if you are going lipo anyway. Maybe someone has a say on this.