I was fiddling with the reflector last night. The focal point seems to be ~3mm below the base. Can anyone confirm that? That's why they use such a tall centering ring.
I had tried removing the centering ring and substituting a 3mm thick o-ring. The beam was very floody. At ~40m, shining into a tree it was almost indistinguishable from my Convoy S6 w/XP-G2 S2 1B @3A, side by side.
nice and thank you for the review you made on GB site.
These are great lights…ready for either basic “tweaking” mods to all out barn burner mods
So far I have just done a very modest mod and this thing chucks some light, even using el-crapo and probably wore out laptop pull 18650’s w/ adapter
Recommended basic “tweaks”
Would I be able to put in the 20mm FET driver or will it slip through?
Still waiting on mine.
22mm
But…there is a solution 
Wasn’t sure since the shelf looked to be a little wider. Can I order just one of those complete?
The hole in the shelf is definitely >20mm, I measured. There is no one currently selling populated BLF 22DD boards. I don’t think anyone has received one yet, WarHawk-AVG only just shared the widened version 2 days ago. If you need one built up I’d talk to RMM - http://mtnelectronics.com. He’s already assembling BLF20DD drivers for $14-15 here. I would expect lead time on the bare boards from Oshpark to be at least 8 days.
Let’s not forget your awesome 22mm Nanjg style build
I contacted RMM and he told me if I wait a few weeks he can get some boards to build one for me!
Thanks for the help, and I will be looking forward to receiving this, if nobody beats me to it I’ll make sure to get some photos and numbers.
Sure. If you can’t wait and are able to solder a little you could always order a built BLF17DD or BLF20DD from RMM now and install it using an adapter ring as discussed in this thread. Take careful look at my shared projects on Oshpark to select the appropriate boards for you. The 26mm v11 is the most versatile (when filed down to various diameters), but the 22mm v9b will require the least work. You’ll get 3 boards when you order, so it’s up to you to figure out what works best for you.
Awesome, looks like I’ll get some of those now, I’m sure I’ll eventually find a use for three of them.
You all really do make sure no problem goes unsolved! Thanks!
Hi guys, about this flashlight. Sorry for offtopic…
http://www.gearbest.com/led-flashlights/pp_5496.html
What battery can it take ? 14550?
this will take a 14500 or an AA battery.
Sanyo is fine but that cell has no protection. Maybe a new thread so others can benefit from your questions? They’ll never find this information buried here.
Thank you.
I officially hate you all that already received your F13.
You made me laugh out loud. Do you normally have slow mail in Romania [I assume that’s Romania], or is it just a sucky experience this time? I bought into the GearBest dreamcharger GB the other day, so I’ll see how my second experience is with them shipping to the states.