Correct but even in Ed's examples, he is saying that if you have two batteries of different mah but the regulators are set to the same voltage, the receiver will draw the higher mah battery primarily.  What I don't understand though is that the regulator, regulates thus providing the exact same thing to the receiver.  So....how does one get drawn down faster than the other if the regulator is providing the exact same voltage to the receiver.  I just got lost.  Dang it!