USB charging and no USB charging: See JKK26 Cree XP-L flashlight: a simple additional section can be screwed in between the reflector and the battery tube that contains charging and powerbank electronics. Simon can sell it as an add-on later.
My ramping driver is in production now ,It is controlled by a mechanical switch. I will describe the UI in detail later.
If Toykeeper has suitable solution, I will also produce the corresponding driver for BLFers
I thought you said the S2+ 21700 will fit carclo quad optics? Oh well, I guess at least I can swap in my triple pills from my 18650 S2+ into the 21700 S2+ for longer runtime and better heat dissipation.
I was wondering the same thing. A 17mm Led4power driver + Luxeon Mz might be good match for this host. Give me a chance to use the MosDTP 4040 board (copper not aluminum)
Looking at the Ali Express pill picture of the S11, maybe the driver retaining ring could be flipped around. And it would create a smaller shelf you could solder the driver to. You would need to carefully cut slots on the inner diameter of the ring so you could tighten it down. What are the dimensions of the retaining ring? Looks larger than a 17mm opening but there are a few 17mm To 20mm Brass Adapter Rings on Ebay.
Thanks for any help.