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).
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.
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.
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.
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!
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…
Well, ACEBEAM only sent me the new flashlight itself, all the other accessories (including the 21700 battery) are still from the old one. That’s why I emphasized that the battery is exactly the same one. All the batteries are exactly the same ones as used in the previous (old/dead) tests.
No spring by-passing or anything else, the new EC65 looks exactly the same as the dead/old one :sunglasses:
Oops, the Samsung 48G curve was mistaken for the ACEBEAM 21700 one in the first new plot. I’m terribly sorry for that. Now it’s corrected, there should be 4 blasts only (but the efficiency difference is actually even bigger!):
Hmmm, maybe there was a bad component on the driver? It reduced performance, increased electrical resistance as well as burned up when pushed too hard?
Replace that bad component and efficiency, voltage and reliability all go up. Now their little light is performing like a champ. :partying_face:
Did Acebeam ever say what the original problem was?