Here you go again. The class has been established with the 3.7 single cell lipo. It's going to be run that way at the upcoming national.The same way it's going to be run here at the state series in florida.Single cell is also what is run in the 1/12th cars. Now there is supposed be a split pack 3.7 cell single cell by someone but I've not seen it yet.Oh yes the single cell is also being used in paved oval for most of there classes also.