I have a couple of eGo batteries that I use. My Mod is temporarily out of service. just in the past couple of days I've been having problems getting my Protank 3 and my Drunker to work on these batteries. if I thread these tanks on the batteries, it appears that I have a short. the light on the battery flashes. if I back the tank off about a turn, it works. Both these tanks are doing the same thing on both my eGo batteries. Any suggestions?