Hello everyone, I've just joined the Buzz Pro fan club and I got my Powerizer RCR123a 3.7 volt batts to go in it too. All I can say for now is WOW, VV without an engineering degree! I don't have to know the intricate particulars about ohms, mah and volts, I can just shove a couple CR123's in the tube, protected or even unprotected, and move the little dial and press a button until things taste right and vapor gets massive. I'm loving that the Buzz Pro will let me now if I've done something wrong by turning itself off before I ruin anything. This is my first VV and I'm glad I chose this one over the others out there.