With the wf-600(Q2) it has a more efficient and brighter emmiter, and it costs less, but I will have to buy 18650 batteries and a charger. The total cost will be like $44. The super thrower seems nice, but it has a p4 emmiter and is like $7 more, but it can run cr123a's, so I would not have to buy new batteries and a charger. But one advantage of buying 18650's regardless of both lights would be better runtime. So between these two lights which out throws the other, and how much more runtime will the 2x18650( vs. 1x18650) capacity of the super thrower give?