Review: Acebeam K40M MT-G2 Q0

Thanks for the review ChibiM! Very valuable information. A few questions and comments:

  • Other people might disagree, but those small pictures showing the diminishing output aren’t useful to me. The differences are too small for me to see. The graphs are great though.
  • In the sentences I’ve quoted from your original post above, there seems to be some contradiction. Could you clarify what you mean please?
  • About the brightness indicator, my guess is that the “ramp” image isn’t supposed to cover modes 1-6. I think they just used a small ramp image that you could see at a glance. Similar to an On/Off switch that’s labelled “0/I” at one end, but isn’t labelled at the other end.

Excellent review! Very thorough!
But for one thing, at the very beginning, it says working voltage ~4V. Isn’t the MT-G2 a 6V emitter? But of course we know that it is. Looks like a factory mistake. :wink:
Nice pics, very detailed work.
Thanks!

Nice reviews with beautiful shots. Ebay sellers may accept your offers with better price!

Perfect review with lots of pictures and useful data.

I agree they all look the same. Maybe putting them in a animated gif will be more relevant ?

Infact it has less runtime than K40M with level 5 which is similar to M51 max.
The Acebeam use DTP copper star ?

Great photos, ChibiM. And nice review to boot :slight_smile:

Thanks for the detailed review mate

VERY detailed and fluidly relevant review. Also, nice formatting!

So an actual 3,000 lumens?! Wow.

Thanks for reading the review!

Good you ask me those questions..

Yep, you are right about the driver.... But I was more referring to the "main parts, as body, bezel, and tailcap.
The driver belongs in the "special inner parts" ;)
I will edit the text, and make that clear, that the inner parts are glued!
Tried even to get the glue out, and remove the driver.. but without success.

Again you are right..
at this point, I was referring in the comparison the runtime in MAX mode.. regardless output..
Kind of like this: The Minimum runtime on the M51 is .......minutes.. vs .....minutes on the K40M.

Again, will make that point more clear in the review!

K40M will have longer runtime in Level 4, than M51 in Max.

Thanks for the questions as well.
Could you please explain where the contradictions are?

I`ll try to explain (not 1 by 1) what I mean, maybe that would clear it up.

The UI is very easy to understand! and can be used by anybody! (as long as someone has a working memory ;) )
It is very easy to change outputs, and therefore its a big plus!!!
Compare it to lets say; Eagletac lights, or lights with hidden modes.. people could have trouble just remembering how to change modes.... same like with the M51, which UI isn`t really the best.

The light can be operated by only 1 hand, but I assume that this light is designed for that.
So I mentioned that it is really hard to operate with only 1 hand, and in comparison to the M51 that could be a CON.
But at the same time very reliable and easy to operate with 2 hands.

So when I refer to the good sides, I imply the use of 2 hands...

the rest (negative) is referring to a 1-hand operation.

Yes, I didn`t know how to "name that little brightness indicator".

about the pictures:
Just showing the steps of output difference can still be seen in the smaller pics.. and in the second post I have comparison pictures with the M51, which are bigger.. on purpose, as I think its more relevant then.

I just didnt think I wanted to take so much space in the review with just beamshots of the 6 levels. I hoped the output difference would be understood with looking at the table.

Yes, I just copied that from the Manual.

I personally think it can`t work lower than 9V.

will change that in the list of specifications

yes, the runtime has been mentioned by Racer86 as well, and I explained it in my reply.. its the longer runtime in its max mode.. (although with lower output)
Yes, I measured it and its DTP..
I put 1 probe besides the MT-G2 where it has a little blank space of copper, and the other one on one of the screws, and it had continuity....

Thank you ChibiM, I understand now.

Thanks for the hard work, well done.

Great review!! Seems like a solid performer.

The one thing I don’t like is that for about the same diameter they could have used 4 cells in 2S2P instead of 3.

That`s 1 thing I also thought.. its the same diameter as a SRK.

Maybe they wanted to have more headroom for more Vin... not sure what the reason would be.

Thanks so much, very useful review.

Your welcome. It's a lovely light! If you can pick one up for below 100, get one!

Great review and beautiful pics!

I modded a TN31 to XHP50.2, but the driver was originally for 3V LED
semms it has some output voltage safety shutdown, so very likely a voltage divider needs to be adjusted

So I need a high res picture of this identical K40M or TN35 driver to read all resistor values

Lexel, unfortunately I can't help you. I noticed that I tried that before and damaged 1 of the screws. All 3 screws have some sort of glue on them...