I've now cleared out and/or sold most of my old vaping gear as my reo and reo LP are all I'm now using. But I'm feeling the need to add to my Reo collection once Christmas is over. The thing is, I'm only using 18650 batteries with my Reos but have quite a collection of 18500s just sitting there. So..... a mini 2.1? Might be a good way of using the batteries and getting something very small for work. What do you think? Is the mini worth having over the standard size Reos?