Will the 21-70 Battery (a.k.a. 21700) Replace 18650?

[Jensen567]

I might have built the first dedicated 21700 flashlight. The Samsung 48G works great!

Jensen567's Entry for the 5th Annual Old Lumens Scratch Build Contest - Machine Made Category

Hi all, This will serve as my build thread for this year’s 5th Annual Old Lumens Scratch Build Contest. I am entering the machine made category. This will be my first ever scratch built light. I have done plenty of mods and made parts in the past but have never made a full light, so I am excited to see how this goes. Not entirely sure what I will be building yet, but I do know some basics, in that I want to build what I see as “the future” of mass produced lights, which incorporate things that…