Well, maybe you can torture your new EC65 with Samsung 30T/40T and see what heppens. I got no chance to do so before its death 
Yes, just ordered some 30T and Lishens just for this purpose 
Awesome!
Thanks for sharing.
Still good since it died peacefully and nothing dangerous happened.
That’s a very powerful boost driver, but that means the driver electronics have to dissipate a lot of heat, probably 5W or more, which is a new challenge in the confines of a small flashlight cavity.
Yeah pretty impressive for a non-fet driver to take 10A+ on the input
Thanks for the review and info. Does this use the same noctigon pcb and carclo optic as the D4?
Boost drivers lose efficiency the more difference there is between input and output voltages.
If the output voltage remains constant and the input voltage drops, the amount of current it can deliver decreases significantly, so it steps down to a lower mode.
I assume you’re talking about the large steep drops in output.
If you’re talking about the slightly inclined output line which isn’t perfectly horizontal, that’s because of heat.
I know this is the case in theory, but I don’t know to what extent this is the case in practice. The M43 (3S4P) is able to produce max output with cells as low as 3.5V, and the Imalent DN70, although with a 6V emitter, can produce flat turbo output until cell is depleted as well. Imalent DN70 - Review / Vorstellung / Test + Passaround | Taschenlampen Forum
Of course neither these two lights have a boost voltage of 12V, but if the latter turns out to be a hurdle, then I’d preferred something like a 2S2P setup for the Nichia leds, and instead of XHP35 use XP-L in 2S2P. Why complicate it with a 12V XHP35?
I understand there is a qualitative complexity with increasing boost voltage, but I don’t see this should result in a quantitative behaviour that output cannot remain flat.
It’s indeed using a Carclo optic, however the MCPCB used doesn’t seem to be a NOCTIGON.
The possible reasons I can think about:
The bundled battery is not a true high drain one, and ~10A should be the maximum load it can sustain.
EC65 will report a warning (triple flashes for every 5 seconds) when the battery voltage is too low. The lower the battery voltage, the higher the input current is needed for the boost driver to maintain a constant output. And the higher the input current, the more battery voltage sag. That means if the driver keeps the constant output until the low voltage warning, the battery voltage sag will be far too high. And then even though the warning is given on Turbo, there is still much energy remaining unused in the battery.
Yeah, the ones I have are 38 and 41mOhm (DC IR). So they’re a bit worse than a VTC5A (30mOhm), on the same level as a decent sample of a 30Q (mine vary a lot, from 30 to 60mOhm).
Thanks. With YR1030, my measured IRs are: 13~14mΩ (unprotected 30Q/VTC6), ~10mΩ (unprotected VTC5A), 14~15mΩ (unprotected PLB 26650-55A), and 30~31mΩ (ACEBEAM bundled 21700).
Maybe you need a similar 4 terminal device for resistance measurement, so as to eliminate the effects like contact resistance?
Reading this thread… yikes!
I’m intrigued by this light. 21700 support, a nice looking quad, and Acebeam. I only own one other Acebeam (UC15), but was impressed with its quality, output and UI.
However, for $122 I don’t think I want to buy a light that goes poof after just 30 seconds on turbo.
Don’t worry, it’s not a $122 light that goes poof after 30 seconds.
… It’s actually a $139.90 light that goes poof after 30 seconds… :person_facepalming: EC65 Brightest EDC Flashlight|AceBeam® Official Store | Flashlights, Tactical Lights
Does it look replaceable with a noctigon mcpcb?
The Meteor M43 does boost to almost 12V! It drives four 3S-LED strings in parallel from a 3.7V battery at 90W. It’s very likely then it can boost to 12V.
The difference between it and the Acebeam is that the Meteor driver is much larger and thus has less heat problems. Also, it wasn’t designed by Acebeam. 
They go a little bit too close to the absolute limits of the driver components. I actually discussed this with somebody last year who took a look at one of their for drivers (the max current rating of the diodes of his driver was too low).
It’s honestly amazing what the Noctigon Meteor M43 did.
They are getting 90W at 3,6V, then boosting it to almost 12V.
It also has a massive inductor, so if the cells were in series, I would be willing to bet it could probably achieve 180W.
Does anyone know the driver size, 17mm? 20mm?
I assume it’s getting 1000 lumen from each emitter. Maybe 1A each at 12v for roughly 4A out of the driver and about a 20A draw on the battery?
Has anyone measured the battery amp draw?
Sorry, I have sent the faulty EC65 back to ACEBEAM today, so I’m unable to identify this.