Has anyone tried a mod that runs off a transformer and a capacitor to run your tank system at home? I have 3 18650 batteries and since i switched to the RSST it drains them fast (1.1 ohm). Is my best option to just load up on some more 18650 and invest in a multi-cell charger? I am just trying to get a feel if anyone has traveled down this road of vaping without batteries?