[QUOTE=kufman]Mr. Unlimited,
a single lipoly cell puts out 3.7 volts so 7.4 is two cells in series. the next step down in lipo would be way under 4 cells of NiMH.
QUOTE]
I know but also Lipo's can be redesigned. Let's say they develop 2,5V Lipo's. A pack would be 5V. Now JMRA accepts this rule who says IFMAR, EFRA, ROAR will follow? In Europe we've always sticked to 6cells while in the USA many yrs ago offroad was racing 7cells. IFMAR didn't allow 7cells for world champions, so let's wait.