I am using my newly arrived 4nine clone mod with a sony vtc4 battery and plumveil RDA running .3 ohm checked on my seigeli 20w. All day yesterday and earlier this morning everything was fine and I was loving my new mod (except for the wonky switch that has to be pushed straight on or it gets too crooked to fire). Just a moment ago I felt the switch get very hot so obviously I got off of it and took the battery out. The battery was not warm. I put the battery in my seigeli and it was just over 3.3 volts left. So my question is does a mod get warm/hot when the battery is getting week?