Ok so i have the Mini nova it came with a 2.4 ohm head and did not work well with a standard ego batt... so i ordered the 1.8 head and a 3.2 head. I tried the 1.8 it read as 2.1 on the lava tube. It did not work well on a ego batt. I then tried the 3.2 ohm and it rocks on a standard ego batt... What the heck i thought the "1.8" was supposed to work better with a standard batt???