I just ordered one. 
23 more available.
The 17mm boost driver looks good, but I’m hoping the larger ones will have more power. I’m at a point in my flashaholism that I’m not satisfied with a reasonable amount of power. I need an impractical amount of power. 
Here’s some pictures. Hmmm, no Atiny85.
There’s not a big difference between 4.2A and 6A. So if you wanted a 70.2 in an S2+, 4.2A is still great. You’ll get much longer run time compared to using 2 x 18350.
Maybe you mean the 12v output? That I can understand.
Personally, I’m still waiting for the e-switch versions with ramping.
I just ordered a boost driver for my S2+ copper edition… I’m planning on using a xhp50 90 cri led that i have on hand for now for the build.
Be sure to post your beam shots and stuff with that LED. I ordered a 50.2 80CRI 4K one to try in a miniC8 OP reflector
Will do, I’ll report back once I have it put together. My led is 5k and the product code is XHP50A-00-0000-0D0UH250G. TA got his hands on some xhp50.2 4.5k 90cri leds that he is going to test on and I think he plans on putting up some for sale. I’m hoping to get my hands on a couple if TA sells it.
They are here:
Didn’t realize yours were XHP50 and not 50.2 I guess it might not be so comparable to mine. Still interested in your results
Also, I dont want to burst your bubble about that 4500K LED but expect a tint shift if you put it in an S2+, here’s are some beam shots of the zebralight 50.2 4500k 80cri:
Well I’ve used these xhp50 leds to make a triple before so I know I like the tint. The 50.2 leds TA has are 90cri and not 80cri, I’m not sure how much difference that’ll make when it comes to the tint shift. Plus I plan on using TIR optics or a Ledil Boom reflector for the light which should eliminate or reduce the tint shift.
Ordered a 17mm BST and there are now just a handful left… XHP50.2 J4 in a C8 with OP reflector, I hope to get a nice even beam out of it.
My wild guess is an ATtiny1616. Either way I think it’s the component on the bottom which could be nice.
What is the component on the bottom? I can’t make it out.
I can’t make out the writing but it looks like it could be a 20 pin package. The ATtiny1616 data sheet shows a ATtiny1616 20-pin VQFN (on page 15) which is consistent the image.
If that’s the AVR then a attractive feature is “Single pin programming and debugging interface (UPDI)”. That along with the presence of the AVR on the exposed side of the driver is a pretty big deal.
Of course it’s a guess for now… [EDIT] a guess that’s probably wrong… There are 20 pin versions of the ATtiny25/45/85.
Mine says
A645
T25
20MUFB
A8PBYA
Maybe a tiny25-20mu
I think that makes sense. It’s good to have something concrete. Thanks.
So, who has tried the boost driver? What are your thoughts?
They seem to work well. The moon is a bit brighter than most FET+1’s at about 5lm I think? guppydrv is nice but ill prob buy the next one with Bistro if it becomes available just to have a consistent UI. The host I used is a Jaxman mini C8 w/ 50.2 so turbo basically steps down instantly. The other modes look pretty consistent though.
Very much looking forward to higher powered 20-22mm versions.
I’m running one in both an m1 and a c8 with OP reflector. Each has a 50.2 in it.
I changed out the tailswitch springs on both lights with firmer ones, because a slight bump to the tail was enough to change modes on them. They have a brass button soldered on.
I am super happy with both lights. They drop down pretty quickly, but gradually when in turbo. You barely see it, but after 20-30 seconds it’s much less bright. They don’t get terribly hot though.
I think I got around 2200-2500lm between the two. Don’t have my notes handy. A bit more from the M1, as it’s a 5000k and the c8 is 4000k. Each was with a VTC5a.
Got a s3 host and a f13 ready to go as soon as the 17mm are back in stock and the 22s are listed.
If you have a way to measure the relative output can you try to disable the thermal protection on the C8 and see if it holds a steady turbo with a fully charged battery? I want to test this but i’m afraid to try it on my tiny host w/ just a pill. Doesn’t have to be long, as long as you feel comfortable just curious if turbo is ever constant.