Got my BD01 today, noticed it flickers up and down in the highest mode. Took it apart and two legs of the MCU are in short, is this normal or same in your lights?
Edit: Also, there is some serious resistance in the front spring, The current varies from 1.6-2.5A depending on the pressure, I will bypass them both, add 4 chips to increase the current and Mcpcb will be swapped for a noctigon. There is possibility for a fet piggyback and XP-L HI by sanding the centering ring but I will not hot rod this one, I have been modding too many lights the same way and it feels boring to have another FET + XPL HI light.
The integrated charging system works surprisingly well and pulls 0.92A max from the USB, I guess about 1A to the battery after conversion and losses. It can also run without the battery as an emergency light but the output is very limited.
Overall very well built light, good output and decent throw, I would prefer it not having the empty room in the tail to store the 18650 rings and the overly long spring a la maglite.