I got my SMPL Copper clone, its my first copper mod. I have been using SS mods for 6 months and been building 0.2-0.4, normally 0.2ohms with sony VTC4's. I noticed that copper mod gets warmer(NOT HOT) than SS Mods, better heat conductivity from hot rda? and my Sony VTC4 battery gets BIT warm inside the tube, so my question is that if its normal that the battery gets bit warm? Not hot, not super warm, just a little bit warm.