So, new box shortens with wattage control and you mentioned slight advantage to .8 rod. Is that advantage we will be able to run .8 with 7.4v setup with the dialable wattage?
no that advantage is running a .8 ohm rod with 30 watts will help with battery life as in not over taxing it all the time vs running a 1.5 ohm at at 30 watts.
Currently the device is set up to run a single 18650 battery High drain AW 2200 mah or something similar.