I received my Yezl S7 today and it is absolutely the perfect AAA light for me that I was looking for. Has the H-M-L with a clicky with GITD O rings with a R5 and no strobes. The memory function is nice and simple.
I use my eneloops along with 10440's and LifePo4 AAA and BRIGHT!!. This light is absolutely beautiful all around and excellent quality indeed, and as a added bonus they have a extra XPG-R5 emitter and the round electronic drive board I believe that's what they are called in 2 small seperate zip-loc baggies.
The Trustfire F23 on which this light is based is also a very nice light. I expect that this Yezl which is more limited by the cell than the AA version is a better light - there is just too much heat from the S5 to make stainless steel a sensible material.
Hi, so far as the heat goes I did not feel any decernable warmth at all. I was trying all 3 types of batterys mentioned above, but I will not use this as a EDC but just to have it as my "Trophy" light. BTY when I received my Tank 007 it was DOA so DX maned up and sent a replacement.