These were both sent to me by Olight, through Going Gear. I’m a fan of 16340 size lights, and the S1 is one of my favorite lights to carry, so I was interested in this light for sure! I’m also a (relatively) recent convert into the 18650 world and many of my favorite lights are 18650 lights! I’m doing these two lights together since they’re so similar – differing really only in the cell they use. Special thanks to Going Gear for sending these my way!