I've been pondering (for many months) those 5K lumens custom Maglites that Matt builds at Adventure Sports Flashlights. Finally ordered a purple one. Uses 2X 26650.
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Dangerous in the wrong hands. The turbo timer can be programmed to safe limits with the installed DrJonesGuppy2drv firmware. However, before adjusting the turbo timer (which is OFF out-of-the-box), I wanted to see how hot it would get after 15min. Ouch.