Some observations based on testing my light.

There is no yellow switch light. (There are only 2 leds)
You lose turbo at 3.70 volts.
At 3.4v the green light switches to red.
The flashlight bulb, or led, is easily removed, it’s the driver that is glued into place.
My version was definitely not 5000K NW, it was more of a 6000K-6500K CW.