Which version of the Kick?
The Kick-1 (and those made in China) are only a "booster", meaning that they can only boost the voltage up to meet your selected wattage. If your selected wattage would require less voltage than what's left in the battery you will be the same as unregulated until the battery depletes to that level.
The Kick-2 regulates the voltage both up or down to give you your selected wattage.
example:
The 1.25 ohm build in my
kayfun only requires 3.5v to give me 10 watts. So my battery would be almost dead before a kick-1 was able to regulate the wattage.
I would be at unregulated battery voltage until then. (more than 10 watts)