Ill get scolded for this but I really don't care. I use my evic to check my ohms and have been since I started dripping over 6 months ago. I've also performed several venting experiments for batteries in controlled environments. I have yet to blow myself up. The new Sony batteries can sub ohm well over 60 amps pulsing under 30 seconds. That's under 0.15 ohms. So if you have solid knowledge on vaping and battery safety, even if your device is slightly off. You will still be safe. Slam me all you want but I have tons of experience on this matter.