Ok..you did see that I said that I'm only going 
through about 3ml per day, right?  If you are sub-ohming, etc., you are using your battery WAY more than I am!  You have to take that into account.  It takes much more power for a battery to power at higher watts than low watts, like I 
vape.  I"m more nice and easy, slow and steady.  No cloud chasing for me.  Your battery is working harder, therefore it is not going to last as long.  I would look on Innokins website and see what they say for battery life.  Aren't they only 2200MaH?
JMHO.