On a VV device, the resistance of the coil has little to do with how fast the battery drains. It's the watts that matter, since most people like to vape at the same watts (or close to) regardless of LR or SR, the battery drain would be the same.
OP, if you've noticed a drop in battery life, there only a handful of explanations: you are vaping more, you are vaping at higher watts than you used to, battery is headed south, or any combination of the previous.
OP, if you've noticed a drop in battery life, there only a handful of explanations: you are vaping more, you are vaping at higher watts than you used to, battery is headed south, or any combination of the previous.