I've noticed that even when I have a fresh battery, I'm just wondering if the pre-manufactured coils aren't rated to the exact ohm? I have 2.2ohm in my PT II's and I'll get an ohm reading of anywhere from 1.8 to 2.5 on the same coil. Maybe we need to more carefully check the contact on the top of the eVic before we put our tanks on and make sure they're clean?