When I bought my mec mod it came with a blue inr 18650 battery not sure how safe it is . I'm looking for a all purpose battery or 2 that will run along time. I would be using a 5 to 12 watt kick with my nautilus mini most of the time but might get the urge to use my rda. I thought I would ask the good people here. PS I don't want to have my face blown off by a cap battery.