I was only teasing, lol. ;-) But WildTrail has got more in the oven already, so don’t put that extra battery too far away. :-) Last but not least, I agree the P42A on NKON was an offer too good to let pass. I just figured I didn’t buy enough for a triple battery light. :FACEPALM:
By the way, Jacky gave me some explanations concerning the battery carrier and the two LEDs in the center part that indicate the charging/discharging status. I will soon post some more information here, maybe including some first hand videos for illustration. He is now checking cut-off voltage when discharging via USB-C. I was also very pleased to hear that WT90 will work with smart chargers, i.e. type C to type C cables.
TA, I guess I will keep you busy posting another new link for the updated manual, lol. :-P Anyway, it will hopefully be the last update, so the print job can commence by the end of this week.
Is it just me or are those two comp’s impossible to decifer? P42a tested at 10amp discharge and 40t tested at a 35 amp discharge??
Anyway, I have quite a few p42a’s, identical performance to 40t, guaranteed fresh cells if buying from authorized dealers, and in 2021 at least half the price as a 40t. Mooch has some good relevant info on how they measure up (and surpass technically) the 40t, except for that first 30 seconds like you said.
Agreed! I don’t want to annoy the crap out of TA anymore, so I’m glad you said it first! I’m ready to pay lol.
Oh man, now I’m gonna have to go back and count how many requested a silver one before me. I requested mine on the 150th post so I gotta read all 149 before me and see if I made the cut.
Thanks for the info.
Riiiight, there are new posts on this everyday and I can’t take it!!! I need the peace and comfort of knowing it’s been ordered already so I can go on with my life. 
I just counted and there are about 21-22 silver requests before me so if there are 25 exactly like we’re told…I should be in for a silver of the first batch. HELL!!! YEAH!!!
I guess I will be incessantly looking for my invite to buy that bad boy everyday until it happens.
Okay, I’ve been really good this year and sat on my hands on a couple of other options… Please put me in for a raw/clear ano one.
I like the sound of those P42A batteries too. Will have to source some.
Correct, although they also said they will be putting in an order for more silver lights that should be ready in 30-40 days, so anyone that misses out on the first batch won’t have to wait that long to get a silver light.
lol, no annoyance, just busy so can’t respond as fast as sometimes. It is all Good.
I would really like a clear one, but if they are all gone, I will take a black one.
They are making more clear lights, it will only take about 30-40 days so worst case you can simply wait for the second batch of silver if you want as well.
More light mods - adding bypasses to the carrier springs
The carrier is easy to disassemble with the right tools. Believe I got this tool kit from BG. The tips seem more precise than a cheaper set I had. 22 AWG wires shown
Here's the USB charging circuit:
22 AWG bypasses installed. I usually do bypasses internal to the spring, but with the compression these springs can get and how little interior space they have, went with outside mounts that won't interfere with compression:
Results were marginal though. Probably could have used 20 AWG wire, but didn't expect much after the more significant bump with the driver spring bypass.
I did run a test with a set of 50G cells, but stopped it after 3 minutes because of heat. Outside temp reached 57C. Took a few minutes to cool down to 41-43C, where it was comfortable to hold. I don't think I gave it enough cool down time from prior turbo tests on 40T's and 30T's. After this carrier spring mod, first tested on 40T's (results above), then 30T's and got slighter lower results than the 40T's, then the 50G 3 minute test. So in between, probably should give it 15-30 mins of cool down time, but didn't.
Comparing these results to my Noctigon K1 with spring bypasses, the K1 on a 30T measured 22.3 amps, 5410 lumens at start (about the same the WT90 does stock).
I'd have to guess the WT90 is doing about 30 amps after these spring bypasses. I don't have an accurate way of measuring lumens on a GT90, but I'm guessing this WT90 is doing better than even my spring bypassed GT90's.
For that driver bit set above, BG doesn't sell it any longer (paid $17 in Dec 2019), but here's the same kit on Amazon US. I tried a couple of other kits and this one is by far the best.
My inconsistencies with throw measurements I believe is from battery charge level and cool down time. I probably should re-charge the cells after lumens testing, wait at least 30 mins for cool down, and then turn on turbo for 30 secs before hitting the meter. But to save time, I cut corners, and not being consistent with that.
Surprisingly, even if this light feels cooled down, internally it probably is not, but after the bypasses, the roughly 30 amps generates a lot of heat, just too much for any light to handle.
So it made less throw but more lumens after the carrier bypasses?
Either way, over 1Mcd from a light this size with simple mods is very very nice! Can’t wait!
My personal conclusion from your hard work (much appreciated! ) is that the WT90 does not really require any tweeking apart from checking the screws of the battery carrier. I could not measure more than 20A when I tested the SBT90.2, but I expect 30A to be already at the wrong side of maximum output, while the (likely) 20A of the stock light feels much more comfortable to me and is pretty close to max already.
Guessing that is just variance in testing conditions.
This was basically my conclusion as well when messing with the prototype. Don’t get me wrong, modding it further is cool and does provide some extra output but not something I would recommend to anyone that has to ask if they should do it.
Still, really cool to see it getting over 6k lumens in modded form! To those that like to mod that is a nice result considering you don’t have to use turbo unless you need it.
Some issues on the prototype:
Comments:
Note: probably offline rest of day, another round of layoff's goin on here...
Thanks for all of this testing and break down Tom! Really appreciate the work here. Maybe post a couple pics of beam shots in the next coming days? Thanks again!