I have found a solution to a problem and would like to share. I have the ego-t mod with an 18650 imr battery and noticed it would reset from the battery output mode to regulated mode. Also sometimes when i try to fire it, the button would just flash and i would have to take off and screw back on the control unit for it to work. Turns out the positive lead on the battery got dimpled too much and the problem has been fixed by placing a small magnet on the positive end of the battery.