A Nautilus? This guy? Nautilus.
Because that's a dual coil at 1.6 or 1.8 ohm and that's going to rip through stick batteries. It's more an advanced device topper. Basically, you need more power. I don't know any eGo style battery is going to cut it with a tank like that.
Basically, you're looking for a larger "mAh" (milli-Ampere hours... don't worry what it actually is, it's a measure of "amount of power in battery"... like gallons of gas in your tank
). Biggest Twist out there is 1000 mAh. Spinners go up to 1300 mAh. But, I use dual coil on my Innokin VTR using 2200 mAh batteries (about twice the capacity of eGo style batteries) and I'm griping about them needing to be charged too often.(Hey, they were cheap and handy. I have to mail order anything bigger!
)So the next question is, do you need to move up to an advanced unit of one kind or another?
I know, I know, they look expensive but consider that eGo batteries run in the $25 to $30 range and you'll be stressing them good and hard with a dual coil tank. You'll be replacing them fairly often. Where expensive in 18650 batteries is around $12. Like this guy: Efest_IMR_18650_LiMn_2500mAh_Battery_35A.
And, remember, 2500 mAh is two and half times the biggest Twist and a little short of twice the biggest Spinner. For around half the price.
If you want to go on with eGo batteries while you kick things around, I'd drop back to something like a Kanger EVOD as a topper. Single bottom coil. Nice even if not as nice as the Nautilus but won't just eat your batteries alive.
