Depends how high your cranking the power 
The oled I leave set at 3.7v, I get 2 full tanks and a few puffs off the third before it dies.
This v1 wood, I still have to test as i got it 2 days ago but I suspect the same. I have that sitting at 1 notch below 20w.
The oled I leave set at 3.7v, I get 2 full tanks and a few puffs off the third before it dies.
This v1 wood, I still have to test as i got it 2 days ago but I suspect the same. I have that sitting at 1 notch below 20w.