They usually run them through power regulation circuitry (a boost converter or the digital equivalent) and overdrive the LEDs, maybe into the 24v+ range. The "t

They usually run them through power regulation circuitry (a boost converter or the digital equivalent) and overdrive the LEDs, maybe into the 24v+ range. The "turbo" mode usually only runs for a few seconds at most, and is where they derive the high lumen numbers from. With this kind of flashlight you have to use unprotected lithium ion cells because they far exceed what the protection circuitry will let you do. Also related to their tendency to go kaboom if set up wrong.