I just ordered my first provari and ordered one of the new batteries. I have a battery from a mod I don't have anymore and was wondering if it would fit in the provari. I'm doubting it as I have not seen this batt mentioned anywhere, but it's the AW IC (black) 18650 2900mah. I was thinking maybe with the spacer that comes with the new batts, or is the diameter too large? TIA