9.6 volts
I have the wattage live wire, it has the 370 motor and 4.58:1 gear ratio, but 9.6 volt 800 mah battery. It has blenty of power, did loops, good vertical, but only flew for 2 minutes, then the gears stripped. Because of all the bad post about the gears only lasting a few flights, I ordered a new motor from a different company.