The nice thing about the Disruptor is it handles whatever I've put on it, tanks from different companies, rdas. I've even built on it. I foresee it being an all around work horse for a good while. I like the built in battery. No extra cost on rechargeable batteries and a charger. It is nice to have 2 batteries though.
I did that too with the nicotine level, 18 mg and made myself sick for a couple of days. Part of why I got a Kanger subtank. I've vaped on and off since 2010. I stopped in 2013 and was using 18 mg, so it's what I started back up with. I didn't realize/know how much the sub ohm tank delivers!
Just checked innokin's site to get the info, but gee, they make it had to find info about the innocell.
But as I recall, it's not a fixed battery, but it's not the standard 18650 size.