You mean I'll lose the momentary high setting(aka blast)?
Even if I chage over, I can still use 800 lumen mode by rotator on the head, right?
Thanks.
Yes, that is correct, you lose the momentary high setting. The light will function normally via the control ring, or at least my light does, as I just checked.
Have you noticed how long the tail cap is on your light? There is a resistor in the tail cap that has to be there for the light to work the high mode.
I've got the UB3T Invictus and the M3LT, which you can swap the tail caps between without losing any functionality. If I use the tail cap off of any of my other lights like the M3 or the M4 Devastator, high instant mode doesn't function.