like i said, it has to do with the power output.. not the mAh
I don't see why it should matter on a VV device though.. if I tell the device to put out 4.4v I would think it would do the exact same thing with either batt. But i'm probably just missing something.. 3 months ago i didn't know what a 18650 or a rcr123a was.. i understand very little about battery's and voltages and stuff. hopefully Switched or someone else pipes up and tells us why the IMR's are better.