Yeah I would not go with a GensAce, the warranty sucks. I would also tay away from the 4s hardcase pack that everyone wants. The cells move inside the case. I had the positive tab on the cell break off on me in a race and the buggy stopped. After checking things out the pos wire pulled right out of the case. I didn't run the pack until after the 1 month warranty. I contacted hobbypartz and they basically said I was screwed.

I tried to solder the wire on but the aluminum tab coming out of the cell does not take well to solder. And with only less than 1/8 inch of tab I do not want to put to much heat into it. So I have a $66 paper weight.

I would not recommend the 4 cell to anyone.