I have the same battery (if you're talking about the one that screws straight into the charger to charge, not the one you put an 18650 in) and I used to use it with a TOBH. If you are talking about the CF sub ohm battery, not the CF mod, it will not fire down below .4ohms. When I was using it for my rda I tried to build it about .6 or .7, which wasn't that hard to do. It works OK when it is fully charged, but as the battery drains it lags (takes longer to heat up the coils) If you build below .4, it will not fire, the button will just flash. It does not last too long when using it that way, and since you have to plug it in to charge instead of swapping out the battery, it's kind of a PITA. It will at least give you an idea if you're going to like an rda, though, without having to spend money on a different mod.
Odd. I've used down to .24 on my Aspire CF sub ohm battery, and it was fine. .4ohm should be fine, maybe there was something else going on, .4ohm is actually a nice resistance to build for these, descent power and battery life.