[slimthelineman]

cant take it anymore, lets not forget people, these are AC MOTORS. which equals inductive load. the esc does not pull power from the batteries, the MOTOR does. the esc simply meters the flow to give linear throttle control. highest current draw is at startup not wot like a brushed motor. the motor will take all thats available unless something stops it, the esc. if the power is not there to be taken from the battery the motor will fry anything in its path in an attempt to get what it wants, usually the esc. setup will dictate how much load is present, ie. gearing. higher gearing means more load and more heat. the easiest and most relevant example is the NEC's requirement for voltage in our homes, no lower than 116 and no higher than 124. try running an ac appliance on 100 volts and see what happens. so yes crummy batteries CAN fry a speed control. caps and other componets cant keep up with the giant surges from the motors when the voltage in the pack dips below the point where it can supply the current being drawn.