The quick answer is that it is easy to calculate this. Our batteries are rated in mAh, or mili amp hours. A 1,500 mAh battery will supply 1,500 mA, or 1.5 amps for 1 hour. It will supply 3,000 mA for 1/2 hour. You get the idea.
To make things a bit more interesting, the faster you discharge a battery the less time you will get from it compared to the calculated time. So in our 3,000 mA example, it will give us less than the calculated 1/2 hour. If you discharge at 6,000 mA, there will be even more discrepancy between the calculated and actual run times. The guys on the flashlight boards do a lot of battery testing. Google the battery you want a curve for and you will likely find it so you can calculate run times much more accurately.
I'm running a 0.7 ohm setup with MNKE 18650's, 1,500 mAh, and I've never had less than a day from one. Of course, here it gets more interesting again. I vape about 2 ml a day. On a full charge, my drags are very short. Drags get longer as the battery charge decreases. This setup uses a lot of
juice per puff. I change batteries on average at about 3.7 volts, so only using about 60% of the charge. So, lots of variables in the picture, but maybe this will give you some idea of vape time running low ohms.
Keep in mind also that I always use a DMM to check my batts when deciding to change them or not. I also check them off my Xtar charger every time to make sure the charger did not overcharge them. I also check for shorts with the DMM when installing new wicks and coils and sometimes when I'm pulsing in a new coil. I also stay very aware of any heat that may be generated by the PV while I'm
vaping. If I were not willing to do this stuff, I would not vape low res.
