So I got my SilverBullet a while back and have been using high drain AW imr 18650's with a low res atty and love it...I wanted to test out the whole 6v thing so I ordered a Hv atty (4.2 ohm) and some rcr123a (tenergy LiFePo4) batts, I got two sets so I'd always have charged ones....when I first put the fully charged (@3.2v) rcr123a's in it vapes great but after a short while, maybe an hour, of chain vaping it stops working as if the batts are dead. So I take them out and the top one is @about 1v but the bottom one still reads 3.2v over the next hour, without charging, that top batt voltage reads back up to 2.7??? Wtf?? That should still be around 6v so I put that one on bottom and the 3.2 reading one on top but still won't fire atty..put in 2 fresh batts and vapes fine for a short while, so I know atty is fine, but same results in the end..am I doing something wrong? I know the top batt is supposed to drain a lil faster, but it seems like the bottom one doesn't drain at all, I've marked the batts with a sharpie and tried all possible combos in case one of them was just bad....Plz help any advice appreciated