What am I buying? 21700 of course…because that’s the way the world is moving, weather it be cars, power tools, or flashlights. Imagine a Convoy C8+ powered by a 21700….especially with the latest incarnation of CREE LEDs. Not sure why anyone is interested in that 3 LED Sofrin C8F…the whole idea of a C8 is to be a thrower, not a triple LED gimmick flashlight. Patience my friends, don’t go buying the first 21700 light that comes along.