Hi I'm new to vaping and I just got a smpl mech mod with a mini velocity rda. And I have a IMR 18650 2600 mah 3.7 volt battery. I'm running a double .5 ohm coil build (not sure if that's the correct term lol) and I was just wondering if that is safe. The seller said it was safe but I've been looking at sub ohm charts and it says it's really dangerous. I'm very confused and would like some help. Thanks 