Hi Sparky,
Yes, with a much mod like a Nemesis there is no circuit board to moderate the power from the battery. It's essentially a tube with a contact at either end and will give out whatever the maximum output is when the battery is fully charged (approx 4.2 volts) and then drop off as the charge reduces with use. This means that the output given may be just what you are seeking with flavour and vaper but then dwindle until the battery is re-charged to maximum again, or that it gives too much output for your tastes to begin with but then reaches your preferred level once the battery has passed it's initial highest output and drops toward its minimum output. The atomiser/cartomiser you use, the e-liquid and your personal tastes will all set what this sweet spot is. A Kick device is a drop-in module for a mechanical mod and smoothes out this issue. There is a dial on the module that you turn with a screwdriver that sets the wattage output of the battery between 5 and 10, 12, or 15 watts - the maximum allowed wattage output depends upon the make and model of the one you buy. When you find your preferred wattage output you then just leave it as is and it will mean the battery puts it out, even if you change the atomiser/cartomiser to a different sort it will still deliver the preferred output. It will only stop when it detects the battery is at minimum charge level (again what this is varies according to the make and model) so in this way it also gives some later of protection against over-discharging the battery. I hope that this helps.