Tim, do you wear special goggles when doing your emitter testing?
I’m seeing spots from looking at the monitor - he must need to use welding goggles.
Thx guys! Bulk of Design/Features section now added (I'll wrap up battery carrier and charger next).
@indy - no, but I actually should. I was seeing spots for quite a long time after I made each video... 
@ChiX - welding goggles wouldn't be a bad idea. 
Is it possible to use this flashlight when charging it?
You're going to love it here, Beaver!
Nice and exact review…. The price blows ……
Does cost, but for duration performance and mix of flood/throw, about the best on offer out there at the moment. Weigh it up against other quality multi emitters out there and it still comes out competitive.
@Beaver - welcome! I suppose you could but I'm uncertain what effect that would have on the charger.
@raccoon - lol, I always enjoy your "Welcome's"
That’s one fat beaver you have hanging there !
Short of the whitewall/outdoor shots (and potentially some add'l runtime testing), this review is now wrapped up. Tons of new material added along with full Charging graph and details (search multiple instances of 8/18). If you can't be bothered to go back to OP, my opinion on the charger is that it's quite good, exhibiting a very good CC/CV charge curve.
Cheers,
Tim
Another incredible review, TurboBB, thanks so much! Frontpage’d and Sticky’d.
dang really good competition vs. Olight SR95UT.
Speaking of the Olight SR series, rdrfronty sent me his SR90 for testing so I decided to take a size comparo shot to give an idea of how the SP6 stacks up:
L to R: L3 Illumination K40 | ThruNite TN31 | XTAR S1 | SPARK SP6 | Olight SR90 Intimidator
I do also have the SR90 shots in Pt2 (check sig) so you can compare vs. SP6. The SR90 is a much stronger thrower to be certain but total output is a bit less. I hope to get outdoors soon now that Sandy has passed so I can do another comparo shots/video.
wow another multi cell in-flashlight charging WITHOUT battery management electronics i.e. cells are not individually monitored
sounds like a disaster waiting to happen
IMHO as long as the necessary cautions are taken; use quality matched cells (which are included), check on said cells individually every so often and manually balance as required, etc; then the charging set up should be reasonably safe. This is as with anything in life that requires a certain level of attention as it pertains to safety...
Would I recommend the SP6 to someone who isn't willing to take such cautions? No...
I think you get the point.
Are those Keeppower 18650 batteries?
yep, not idiot proof 
and too much work even for a flashaholic
still a bad design. multi cell charge management ICs are cheap. every laptop battery pack has one and they still burn up sometimes…
Agreed and it shouldn't be too difficult to design a carrier that had the appropriate balance leads built-in. As I had mentioned in my review, I'd love to see a revision to the carrier and charging system to allow balanced charging.
Who knows, we might just get it in future lights.
I cant view the uploaded pics 