You normally use LR attys ( usually less than 2 ohms) on standard 3.7 V ecigs like the eGo or Kgo etc.. I use the higher resistance attys on my Provari so I can bump up the voltage. If you put too much voltage on a LR atty it will pop ( break). If you use a HV atty on a eGo you will get much less vapor. I hope this helps. I tried to explain it without getting all technical on ya.