I swapped my V4L batterys with a friend for his regular KR8 batteries, (he wanted my color ones). The draw is much better, doesn't feel like im sucking at air. Makes the flavors like RY4 taste richer. Kent i suggest you try a regular auto Kanger battery with 10 second cutoff.
I don't do autos. And none of the 510's have any cutoff, why downgrade? I have the adapter to run cartomizers and that works just fine. I'm mainly on mods now anyway and no cig style batt can hold up to them for heat or longevity.