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.
So mine is coming in the mail tomorrow. Being in 100 degree Texas, I’m wondering if it’s a quick death. I’ve been wanting this one since it popped up on the radar. 82 grams might be just too lightweight for the lights output. I see possible driver improvements and total potting.
I received a new EC65 from ACEBEAM today. Will update the new test result here once it is done.
Did Acebeam say they found and fixed the problem and sent you an updated version or did they send you another one like you had which might not last?
I was expecting them to take a few weeks before they sent you another. Maybe they though your damaged one was a fluke?
They assured me that this problem has been fixed in the new one I received.
To avoid the unexpected quick death again, this time I’m planning to finish all the other tests of my interest first, and after that, I’ll do the accumulated turbo measurement again to see if the driver can sustain it.
Wow, that’s fast on their part.
One thing is bothering me, though. If we go back to the stock battery, it seems to run for about 16 seconds before ramping down. Is this due to voltage sag?
How many times can you use that 16 second turbo before the battery can’t do it anymore? Once? Twice?
It makes me wonder if they should even classify this as a 4000 lumen light.
I hasn’t tested the new EC65 yet, but for the old one, as you can see in the accumulated turbo curve, it’s less than 20 seconds, only one time. And that’s why I was torturing it with a more high drain LISHEN battery.
Very slight differences in the battery internal resistance affect the turbo stepdown. One of my Acebeam 21700s manages 12 seocnds, one 32 seconds.
Hi maukka, i saw your review… so you measured 3750 @ turn on and 3526 @ 30 seconds… you mentioned you use an integration sphere. thanks.
Read your review on CPF Maukka. Nice job. I see also that you have higher drain batteries on the way, so will soon be able to test it to see if it burns out on Turbo like Toobadorz’ did.
Looking forward to seeing Toobadorz’ results with his replacement. Sounds like excellent service on Acebeam’s part. That was a very fast warranty replacement!
The measurement of the new EC65 is updated. This new one performs well!
I’m having some trouble understanding the new results.
Are they using the same battery as before?
Did you test the amp draw on the tail cap?
The old light did 3700 lm for 16 seconds.
The new one does 4000 lm for 3.5 minutes?
This doesn’t make sense to me. How can it handle the heat?
I see you said you “apply cooling”, what do you mean exactly? Dunk it in ice water?
1. Yes, the batteries used in the tests are exactly the same ones, not just the same model.
2. I didn’t measure the current draw, however the efficiency can be calculated as lumen * hour here.
3. That’s similar to maukka’s test. When the output droped due to thermal regulation, I turned the light off immediately. Then I cooled the flashlight with two fans for at least five minutes. Then I turned the light on at Turbo again. The curves are the accumulated results. Each “spike” in the curve indicates a “power-off, cooling, power-on” (the emitting efficiency will decay when the temperature gets higher). For example, the new EC65 with the bundled 21700 battery took 14 cycles to get measured. That is time-consuming…