I ordered the Ti-Cu FW3A version on August 12 and received it on Monday, 8/19/19. It is totally non-functional. Installing a fully charged battery (I am using the one that came installed in the light from the factory, after charging) will either result in no light or the light will flash after about 1 1/2 turns of the head and then come on once the head is fully screwed down. It then may ramp up to full output and then back down to minimum and back again or other wise act like the switch is being held down. Pressing the tail switch has no effect. I have removed and re-tightened the driver ring to no effect. Could a shorted tail switch cause this?
As a real new guy to these lights, any suggestions would be welcome.
Thanks!