I generally use my AW IMR 18490/18500 batteries in the Provari. Was recently given a couple AW IMR 14500 batteries. I tried one in the Provari and it appears to work fine. Yes it is narrower but that was solved with a little foam around the battery to keep it centered in the tube. Is there anything short of the narrow configuration and reduced battery life with the 14500 that would cause harm to the Provari?