There are so few 26650’s out there these days that I wouldn’t be surprised if every accurately rated >= 5500mAh 26650 battery is the same exact battery underneath. Most people recommend this (heavily re-wrapped/re-sold) high capacity battery for all use cases both low and high discharge.
^ agreed, about them all most likely being the same battery. Not too many companies making 26650's
I have seen people mention that no matter what LED’s they try, they ultimately come back to the 219b SW45K. That includes the warmer 219b’s as well, and I can see why now. There is no warmer & pinker CCT than the SW45K the lower you go in 219b’s. I have heard people say the Nichia SW35k are the best ones, but clearly not for pink. People that say that just like warmer CCT’s, not pinker ones obviously. I’m glad I found this out because I was already putting my order in for SW35K’s. I likely would have been seriously disappointed to not be getting the warmer pinker light I imagined it’d be. Thanks for posting this and reconfirming. I may end up preferring a mix of E21a’s to achieve that warmer pinker light than SW45K i’m hoping to find.
the more i look at jonslider's pictures, the more i think im going to mix the sw45k and sw35. i think thats where my happiness will be. lol
I want that too and it was my number one option but I don’t know if it will be rosy enough.
yea i hear ya. I mean basically both of these emitters look a whole lot rosier than that newer xpl-hi 5D 4000k ive been ordering and have 6 lights with LOL. so i think i will be happy, i honestly have never had a really rose colored led, except for that one good 5D, plus i think these two mixed together will be warmer like i prefer while still have some rose / pink in it. we can compare later lol.
edit - also, te longer i look at the sw45k, the more i realize it is a little "cooler", i think that is my biggest reason why i want to mix them. I like that "yellow"/orange/whatever color a nice 3000k emitter has too. The xpl-hi 2850 8A is near perfect, but just a little too much yellow/orange/ whatever it is lol. but of course its not hi cri either.
I wonder if Jon_slider merging the 2 beam shots would give an idea of what the mix would look like.
hmm, it usually does. at least a general idea. or we could ask him to start reflowing some LED's 
I’m so torn. I already ordered all SW45K’s last night and am on edge wondering if I should do the mix or not. I really do want a warmer rosiness.
In another post, Jon_Slider wrote this…
“I do not consider the N219c 3000k 9050 to be “rosy”
I do not consider the N219b 3500k 9080 to be “rosy”
I do not consider the N219b 4000k 9050 to be “rosy”
I Do consider the N219b 4000k 9080 to be slightly “rosy”
I Do consider the N219b 4500k 9080 to be slightly “rosy”
I Do consider the N219b 4500k 9080 sw45k to be Very “rosy”
It was comment #40
photos are not all set to the exact same white balance
ultimately, each person has to buy and try each LED for themselves
about pinkness… it all depends what it is compared to
the sw45k is definitely the Most Pink, but the SW40 also looks slightly pink, particularly compared to low cri cool white
to me the sw35 has zero pink component, it is one of the reasons I am not a fan…
Im totally biased towards the sw45k, because it is cool enough for daytime EDC
at night, warmer colors work better… whether that is 4000, or 3500, or 3000k, depends on what other light source is in the environment, that is influencing the white balance of the observers brain.
I use 3000k incandescent house lights… what I like at night will be different than what I like during daylight hours
about pink… at night my sw45k does not look pink, because it is cooler than my ambient light, and that blue tone is more noticeable than any pink tint
conversely, during the day, I Do see the pink tint, when looking at the beam on a white piece of paper… this is because daylight is greener…
to really quantify Tint, and pinkness, we have to look at spectrum tests that include the numerical Tint value for DUV… basically, the LED with tint below BBL will have negative DUV… most LEDs have tint above BBL and this will be positive DUV… the sw45k is the main exception… it is one of the most strongly negative DUV LEDs I know of
please dont buy an LED because you think it will look as pink as my photos… those are just how the camera sees the comparison to the other lights in the photo
when using an LED light as a single source, the brain adapts its interpretation of light to make it look white… pink is a figment of the visualization… LOL
Look at post #244 from Andy. SW45K has a negative duv value thus the rosy tint. SW35 is pretty much spot on with a duv of almost 0. The bigger the negative duv value is, the rosier it is. Others feel the SW35 has a slight rosy hue to it mixed with a warmer temperature tint (myself included) but the SW45K takes the #1 spot in rosiness.
Order in for the D4V2 with 219b sw-45k’s. This will save my stash of leds and a decent amount of time doing the mod. Really a no brainer.
Thanks for offering these Hank!
Hank, can I order D4V2 with 219B SW45K as a mule with 8 LEDs? If possible, how much is the surcharge? Thank you. 
good info!
.
watch how the 219b 4000k sw40 “looks” like it has a different Tint, depending on the Tint it is being compared to
in the next 3 photos, the light on the left is the exact same light:
here the sw40 looks “straw” colored:
here it has a slight peach tint:
and here it looks really green!
comparisons appearances depend heavily, and appear to change, depending on the other lights in the comparison
This is good stuff, Thanks. I just compared the two combined beam shots of sst20 4000k mixed with 219b sw45k and I did not prefer it to straight 219B. I guess my warmer rosiness will have come from E21a’s not 219B’s.
find the Tint spec in DUV for the E21a you are considering
in my limited experience, the 3500k E21a is greener, than the 3500k 219b, which itself I do not consider pink at all
the 4500k E21a I tried is also greener, by far, than the 219b 4500k.
otoh, the E21a shows whites better than 219b, because the E21a is not as pink.
what saves the warmer LEDs, for me, is that the orange warmth, forgives the tint actually being yellow instead of pink, and I do recommend the warm E21a options being offered by hank
I like 219b better, but E21a is mostly very similar
Question about optics with the 219B: I’m going to order a D4V2 with the 219B SW35. I like warmer tints and I have the E21A 3500K in my KR4 and the E21A 2700K in another D4V2, and both of these came with the floody optic.
Does anyone know if the 219B will also ship with the floody optic? (I would imagine that would look best, but I’m open to hearing other opinions…)
> Does anyone know if the 219B will also ship with the floody optic?
dont know, suggest you ask the seller
fwiw, optics are easy to swap and inexpensive… suggest you ask the seller for a couple spare “narrow clear” optics to experiment with…
219Bs look fine in clear optics IMO. They are just great in everything.
I have a D4v2 that I swapped some sw40 in and they look great with the clear optic.