Emisar D4S review

Thanks for the detailed clarification between v1 and v2.

I have a question:

How does performance and efficiency of “FET+3” differ from “FET+3+1”?

FET+3+1 has lower and more efficient low modes, and the highest regulated level is a bit higher. It also seems to help the thermal regulation algorithm a bit. It’s a definite upgrade.

However, I doubt it would be a very noticeable difference during daily use.

So you must have made some mistake. 21700 is 24245 mm³ and 26650 has 34510 mm³.

Yes, really.
I don’t see HKJ test of Basen 26650 but I see one from Mooch:

About 4050 mAh at 15A discharge.
Compare that to 30T which delivers nearly 3000 mAh at 30A:

And note how Mooch doesn’t provide internal resistance of this 26650 cell but rates it as capable of 23A. Yet it rates 40T as 30A. Just like Molicel P42A.

Compare the 26650 discharge curves above to that of Molicel:

26650 sags to 3.15V at 30A while P42A stays above 3.55V.
So…P42A is significantly more powerful and has 5% lower capacity at 15A…

Basen 26660’s are so last year.

Golisi Gold at 4500mAh perform surprisingly close to the 40T, blowing away Basen snd LiitoKala alike. Actual in-light real world testing.

I suppose you mean 4300 mAh? Here we can use the HKJ comparator.
8% capacity improvement at 10A and 9% at 20A. And still higher internal resistance (0.02 vs. 0.03). Again, that’s compared to P42A.

Charts and numbers, real world proves a different thing.

So I tested again the Basen and threw in the comparatively new 21700 Samsung 40T. And got a surprise! On my 17 emitter Ham’r flashlight with 5 drivers one cell testing shows the 30T to deliver 30.3A. The Golisi Gold 26650 can do 27A. By comparison the Basen does 21.9A and the surprise comes from the 40T, it bested the 30T with a huge 32.3A draw!

This is a heavily modified Q8 than I normally run on 4 Samsung 25S 18650’s to the tune of over 23,000 lumens.

Back to the original question, why ask Hank to re-tool an existing design for a new cell versus asking him to design a new light around the relatively new cell? Re-tooling for a quarter inch of space seems unlikely.

I’m charging the new 39A continuous rated HOhm Run 21700, will see what it can do on this test. It’s rated as 3023 mAh capacity.

Edit: Real world, the fancy HOhm Run only allowed 28.8A.

I missed that they had the blue one, and ordered black…. maybe have to get another one…

Does the Golisi outperform the Shockli 5500 in real world D4S use?

I was actually never all that impressed with the Shockli 5500 in my lights. For a time the black and gold LiitoKala had me buying more, but the Golisi Gold changed that. The Shockli cells I had were good performers, no doubt, but not game changing or head of the class performance wise.

But, in interest of staying up to date earlier today I ordered a pair of the new Sony (Murata) VTC6A 21700 rated for 4100mAh and 40A continuous. We’ll see…

OK, thanks

sigh Somehow I missed the D4S being released in cyan….and another want added to the list. I love my green V1

Where do you buy those golisi gold batteries?

I notice a new Anduril hex file revision for the D4Sv2 (2019-08-28) in TK’s repository: Index of /torches/fsm

(probably a dumb question…)
I assume this Anduril firmware only works for the new D4Sv2 (attiny1634) and will not work (or will brick) the D4S v1?

I was ordering something from Banggood, so I threw in some 26650 Golisi Gold. Took a while to arrive. Just Google it. Some say they are best if you are driving your battery over 7 amps a lot, but the Shockli 5500 have longer runtime for use under that. But they are both quality batteries.

The D4S v2 firmware won’t even flash onto a D4S v1. They use different control chips, which makes avrdude fail (as it should) with an error.

The new build is basically the same as the 08-05 builds, except that D4S v2 wasn’t public at that time so I didn’t add it until later.

Which battery allows you to have more brightness?

Just to clarify. If I specify a black light with the 1A LED and red Aux LED with Anduril firmware, I will get a light with the same multi color aux LEDs as the D4V2?

Thanks for the clarification. Now I just have to decide which LEDs. :slight_smile:

One more question:
What is the difference between the SST-20 and the XPL-Hi in 6500K in this light?
does one get brighter or have more throw or less heat?
Thanks