I'm about ready to pull the trigger on one of these just can't quite decide on which to get. Wish they sold mini with 18490 and 18650 extension caps. I'd be set then. I'm using an Ody right now usually 2ohm coil and 5v. I've got it on a VariTubeX which is doing fine but I need something shorter to fit my pocket better. I'm leaning towards the mini and extension and a pair of batts for each. Just wondering how much I can expect out of each size batt? Going from night shift to days, the rules are a bit tigher and need some stealthyness 8) If somebody can post a Mini with an Ody on top I'd appreciate it.