I have 2 batteries that are brand new that I bought for my EVIC a couple months ago thinking that I was going to be using it for awhile but at the moment it is just sittting aside looking all sad and pathetic. My ProVari is the new lady in my life and I was assuming that the EVIC 18650 batteries would work in my ProVari with the extension cap. Under further inspection it appears these batteries dont have the nipple at the top or if they do its very small. So does anyone know if these batteries will work? They actually came in individual EVIC boxes if that helps you all with identifying what ones they are. Also checking the battery check options im not sure how to read how much battery life is in volts. So what is the high side meaning like 100% battery power in volts and whats the low side when its time to recharge. And also I have read a little bit about people saying DO NOT use the battery under a certain amount of volts or it will ruin the battery forever. Im curious because when I look at the battery check mode i just see like maybe 3.5 on the screen but have no clue what that even indicates. Sorry for the noob question, I checked the search on here but couldnt find anything, maybe using the wrong keywords? Thanks guys!