Liitokala Lii100 - can often be found for less then $3.
https://www.gearbest.com/chargers/pp_272183.html
If you’re not charging at 2A then overheating and explosion isn’t such a big risk 
When I’m at home and I can, I charge my lights with the cells in a good quality charger. But the convenience of being able to charge from a USB socket is huge as I use my lights for camping/sailing/cycling and other outdoor activities where I don’t have access to a AC source of power.
Yeah, I already have a couple of BLF A6’s with USB chargeable UltraFire 18650’s in them, so the BD06 doesn’t really give me anything additional over those - I was really hoping for much brighter light using a 26550 to keep the runtime higher.
Since my original comment, I also noticed the Acebeam EC60 which seems to tick more of my boxes. Much throwier light too, which is kind of what I was missing with the G20. “only” 2000 lumens, but the throw looks much better.
I guess I’ll probably end up with one of each, such is the way with these cheapish lights, you end up collecting them all
So do you these protected keeppowers from aliexpress would work in turbo mode?
Don’t know for sure. This seems to be an older batch (Version 2015) and at least the 2014 version was too long for this light. 2016 should fit but don’t know for 2015. And they don’t say anything about the trip current (when protection kicks in), this should be 10 A which is sufficient.
Edit:
found some older posts which said the 2015 version is already the shorter one.
Thanks!
What is the head diameter?
33mm on Banggood.
38mm in the OP.
I approximately measured one of mine with a tape ruler… 37/38mm
This explains why after extensive searches I failed to find an optic like that…
Thanks patmurris.
I hope the weather is nice in Nice
37/38mm is the head OD. I haven’t measured the optic.
Rather cold - even for the season, but no snow on the coast so far… I hear the other parts of the country are freezing… 
I understand…it’s simply that a couple of months ago I spend a lot of time seeking a 7-led TIR optic that would have a diameter of 32 mm or less. I failed to find any. I guess the actual optic is like 34-36 mm. I may be able to find it….
The diameter of the optic is exactly 35 mm. I need one, mine is broken.
A floody one was easy:
Check height. And legs.
This one is 35.8, but you may be able to shave it to the size (height is different):
http://www.ledlink-optics.com/MockupDetail.aspx?ID=AAA01F3E9CD24B95A73CCEAAB9515C51
Much narrower 36 mm:
35.2 mm:
Thanks for the links!
Anyone having issues with parasitic drain while the DQG Tiny 26650 III is in standby? I now unscrew the tail cap when not using because it ruined a newer Basen 26650 after a couple weeks of not using the light. The battery dropped way down to around 1.6 volts and I wasn’t able to bring it back. I put in a different fully charged battery and did not use the light, just let it sit overnight. Next day I could measure the drop to be about .2 volts. Curious if this is just my light or others have the same issue.
Measured 9 uA at mine which is pretty low.