I am considering this for my next purchase. However, I am not a fan of 3.7v vaping even with LR cartos and such. I know many 18650 mods can handle 2x 18350 or 2x CR2/15270 batteries for 7.4v or 6v vaping. Can this one handle the same? I know the batteries will likely fit, but is the switch capable of handling this?