11.9A on the cyan Liitokala is not bad. We know the 70.2 has the potential for more. Maybe the FET or the wires are a bit too high resistance?
194 kcd is more than Sofirn’s measured 160kcd with light OP. If the texture is heavy, then the candela is even more impressive as they only measured 127kcd. Nice.
The texture does look pretty heavy.
You got 195kcd out of your black L6? Hmm, I can’t remember if I got the same, but decided to sacrifice a little in order to get a nicer-looking hotspot. My notes are showing 172kcd. Still close, though. I always go by what looks best as opposed to outright throw numbers.
Just tried a pair of GOLISI 4300's, solder blob'ed one. Got 14.5 amps, think about 205 kcd, same relative bump in lumens. The LED wires look decent, think about 18 AWG, but the double springs might have some loss's compared to bypasses I would use. Got slightly more amps on a pair of 25S charged to 4.21V - about 15 amps, but they would probably drop fast.
This took some time - needed to research thru my notes. My notes say the clear L6 has a XHP70 N4 1C, but it's beam tint is well warmer than the black L6 XHP70.2 P2 3B. The clear L6 is about a 4-5 even in tint, I'd say 4000K-4500K. I seem to recall this - think I got a mis-marked LED back then.
The SP70 is warmer than the S70S (~6500K), but cooler than the XHP70.2 3B, so could be a 1C or 2. This is consistent with how the beam looks and how the LED's look under UV light. The old S70S is a strong CW for sure.
@TomE, how close are the springs to one and another?
Since the light has been made with 26650 and 21700 compatibility in mind, the springs weren’t really designed with dual usage in mind to lower resistance.
Here are Sofirn’s specs, and look the inner spring height and thickness.
tail springs:
inner bottom diameter 10
inner top diameter 5.9
inner height 7.6
spring line diameter 0.7mm,
out bottom diameter 16
out top diameter 8
out height 13
spring line diameter 1.0 mm
I don’t even know what type of BeCu they are using.
Could be using C17530 38% IACS, or C17200 22% IACS.
Still, have you tried it with 21700s?
What’s the weight full of cells?
How is the UI?
The UI sounds real good Tom. A big step up from the S70S and L6 UI.
I don’t think it was made to use both. There is just too big a difference in the lengths. I believe they designed it with 18650 and 26650 in mind. This is also why it comes with 18650 adapters and not 21700 adapters.
So even though the amps measured lower, the 21700's did better. Probably because the spring compression is better. I don't think there's any issues with these 21700's I used - tailcap wasn't hard to tighten up at all. I'd suspect bypasses on the springs would get more amps.
Weight: 671g no cells, 809g w/21700 cells (Shockli).
OK, did the dirty deed of adding 20 AWG bypasses, and ripping out the small inside springs. For those of you not familiar with the SANYO 2070C cell, it's a 20700 size, 3500 mAh rated capacity, nice protruding top so you don't need to add a button or solder blob. It's the best performing cell in the 20700 size, easily beats the SANYO 20700A, which is quite a good cell itself. Available here:
Does anyone have driver pics yet? I’m really curious what FET they are using. I’ve gotten currents up to 19A on my Lexel made driver with Aspire 4300 cells.
I’m wondering if the FET is what is keeping the amperage down a little. Still, that’s some impressive output on the stock driver. The slightly lower amps is probably going to give you longer Turbo runtime before getting really hot. Besides, I don’t think you’re going to be able to see any difference in output with your eyes between 14 amps and 19 amps. Mostly just a bump in the numbers.
How did you remove the internal spring without removing the external spring?
Did you do this to make room for the longer 20700 cells or for greater current flow or both?
I assumed both springs are current paths, in which case removing one spring and adding a bypass wire gives no net gain in current flow?
I wonder if placing a wire connecting both ends of each spring to each other would also do the same thing? This may first require stretching/pulling the end of the internal spring upward to meet the outer spring.