Actually, that is incorrect. Oddly enough, if you adjust for the same exact wattage, the amperage, or battery usage, will be greater on the lower resistance. Lets check it out. Lets say you want to vape 10 watts and have a 1.5 ohm coil. You would set your voltage for 3.87 volts to get that 10 watts. Your amperage, or battery drain, would be 2.58 amps. Now, lets say you have a 3.0 ohm coil, and want that same 10 watts. You would set your voltage for 5.47 volts. You amperage, or battery current drain, would only be 1.83 amps. You can see the signifigantly lower amperage. This has nothing to do with vaping, cartomizers, or anything. It is simply the nature of Ohm's Law, the nature of electricity. When people say lower resistance drain batteries, it is not just because it pulls more power, but when is equal, the higher resistance will be more efficient. Check out an ohm calculator, play around with it, so see how it works. It is pretty interesting. Thanks.