Samsung 40T and Vapcell T50 don’t come close to the Lishen LR2170HP in terms of peak current when used in series in a Nightwatch NS59v2.
I damaged a Sofirn Q8 Plus by using three Lishen LR2170HP cells. Two LEDs are stuck on, and it peaked at 28.9K lumens for a second.
That jump starter uses a LiPo. Those jumper packs usually use pouch type LiPo batteries, they’re higher current than nearly every Li-ion and cheaper. They just don’t take abuse as well as cylindrical Li-Ion cells, and are physically rather delicate.
I know, just saying there’s technically a flashlight out there that could use them
You can go up to about 35A continuous with a P45B before reaching its 80°C max temp rating. The 45A datasheet rating is temperature-limited and for the typical non-continuous applications the P45B was designed for (power tools, vacuum cleaners, etc.).
At 45A continuous it reaches about 100°C before the end of the discharge….wayyyy too hot. 
For non-continuous use it can certainly be (carefully) used at 45A but there’s a lot of voltage sag and accelerated aging at that extreme a discharge current level.
I measured current with clamp meter on Nightwatch Chaos. First with stock Lishens and Second with P45B’s. P45B’s outperformed Lishens by about 1,5A. If I remember numbers right Lishens were ~50A and Molicels ~51.5A.
I measured around 50.1A with Lishen’s in a Nightwatch NS59v2
Interesting.
I am in the process of building a light using the SFH55 emitter , with claims of 28A continuous and peak capabilities in the 60A+ area.
Ordered Molicel P45B to try in it. So y’all think this mystery cell can deliver maximum power to it?
I haven’t been able to get either to test, but I think it might be up to par with the P45B if not slightly better.
I started researching it to do the same, to see what the absolutely highest power possible is from an SFH55 in a 3x21a host, estimating 14000 lumens and a lot of throw.
Originally I was going to make it with the 54A convoy fet driver, but Simon wouldn’t sell the 3x21a as a host, and the temperature regulation on convoy drivers was kind of dangerous has put the project on hold for me, until I can get a good deal on a SBT90 3x21a and find a suitable Anduril driver (maybe as a piggyback/sisterboard).
The MTN Electronics driver I ordered from Richard is out for delivery so I may be building this SFH55 today.
Have the emitter and an Illuminations Machines Diamond reflector fitted to a Sofirn SP70, will just be a matter of assembly.
Will need to machine either a carrier for 2S cells to act in parallel or a dummy cell.
make sure to order a new FET to solder onto the driver.
The pre-installed one has a high internal resistance
The driver I bought for this build has a a near 0 resistance FET. Richard knows my needs well. 
Edit: Adapter for 26650 to 21700 is machined, dummy cell is complete but perhaps not properly fitted. Will finish that when I get the spring on the driver and the driver installed.
Oh, Richard does the driver with the better FET again?
Last I heard he stopped.
The 7135 stopped on my drivers too sadly
I have this SFH55 LED in a Mateminco PD90S. I don’t have P45B yet but followed are outputs using Neal’s Lishen vs Samsung 30T.
Neal’s Lishen consistently surpasses ALL batteries I have, in ALL my power hungry lights. If P45B comes anywhere close to that, it would be quite a feat. The Lishen vs P45B comparison is going to be fun; partly why I like to wait for Liionwholesale, to make sure there’s no question about provenance/pedigree.
Mateminco PD90S:
Output 7400 lm w/ Neal’s Lishen, 6700 lm w/ Samsung 30T
Lumintop D3:
Output Lishen 6500 lm w/ Neal’s Lishen, 6200 lm w/ Samsung 30T
If the FET Richard uses is too high in resistance I have several options I can go to.
Some firmware does not use the 7135 chip. I’ve built a LOT of drivers and can’t recall 7135 chips giving me any issues. No matter, I have those as well.
What I didn’t have was a 30mm pcb to build my own. Lots of others, both bigger and smaller. Of course.
I don’t have that Lishen cell, but the new P45A is en-route as we speak. The 40T just made a serious showing to set the bar… 30.3A in a Sofirn SP70 with the SFH55 emitter producing 8590 lumens at start-up.
I’ll have to try and find that Lishen.
FAIW, I changed a lot on the driver I bought. New ATTINY85, Anduril, stacked 7135 chips from a 380mA bin, and an Vishay-Dale SIRA00DP T1-GE3 MOSFET. Also 115 strand 18 ga silicone wires and a nickel plated Hornady 9mm casing for the positive contact. 
Get some SIR178 next time you make an order, SIRA00 and other FETs used in these DD driver are often 4.5Vgs rated (logic level) and the ON resistance increases quite a bit below that at 1S li-ion voltages, SIR178 (2.5Vgs rated) has very low RdsON even at 2.8Vgs, on top of not costing much.
The A00 is rated at decimal point levels in the area I use a flashlight. (3.5-4.2V)
I am out of 404 or I’d have used that.
Still, the A00 is cranking out some serious lumens, especially considering the heavily diamond faceted reflector I’m using.
Thanks for the heads-up on the 178, will check into it. Not modding lights much anymore as there are new interests gobbling up my time. Although lately my buddy has been asking a lot… lol. Bored old men. Whatareyagonnado?
Edit: Wow! That does look good! I see that it came out while I was AWOL. Might have to try a new Ledil and tack a handful of these on! Thanks!
Lishen 21700 cells ordered from Neal. SIR178DP FET’s and a 70mm Ledil reflector coming from DigiKey.
