Oh, and 1200 mah is not 1.2 Amps, it is 1.2 amp-hours.   It is a measure of the capacity of the battery, not the current capability.  I have seen 100 amp ESCs but have never seen a 100,000 mah rc battery.  And my 100 AH car battery will pump 700 amps into the starter, just not for an hour.