I would like to hear everyone's opinions on these devices. I am trying to decide if it will work as a daily driver for me, a dual 18650 device lasts me about a day in the case of my paranormal, my geekvape Gbox a bit less thatn a day. How would a single 21700 compare, would it last the whole day, or would I need to swap batteries? I would also love some thoughts in the SL Class vs the Odin 100. What I like about the odin is it seems like there is a piece of protective plastic over the screen so juice has a harder time getting in there. I also tend to be a bit rough on my devices, not abusive, but because its almost constantly used I tend to be hard on a paint job, also a tumble happens every now or then. In your opinion would either of these choices work for me or should I rather look at something else, more in the dual 18650 form factor?