Texas_Ace MT09R Modding thread, 20k+ lumens, 80CRI, can start fires? Yes please.

Are the 2 cells pointing up/down side by side or diagonal?

These are good cells, I generally just use 30Q myself since they are cheaper.

Lexel should be using the TA FET driver in the MF01, not a buck driver.

It should also have NarsilM in it while the D4 uses RampingIOS. They are pretty similar, but not identical.

I have the 30Q on the BLF Q8. Was hoping to try out a different set of batteries on the MT03

Since you have had quite a few MT03 came your way, any idea if they will take flat top batteries???

Where could I find 4 of these. Seriously I would love to test some out.

Besides the driver swap, an important consideration is whether you’re working on a early version 1 or a later version 2 MF01.

Version 1 has 6 wires going to the leds and uses 6 volts.

Version 2 has 2 wires going to the leds and uses 18 volts.

If it’s version 2 you will have to cut traces on the mcpcb and add some wires to get it to accept 6v. This extra work for version 2 has to be factored in.

There is only one place selling them, IMR Batteries in Houston, and they are $18 each. Shipping was $11 for 2 of them according to DBCUSTOM. So not cheap, at least for right now.

That's a ton of power from even a single cell. May have to wait until next week and I am not seeing a button top so some solder blobs and these should prove to be trying to find somewhere to get my hands on a few dozen.

Thanks very much...

His FET driver is cheaper and higher power than his buck version. But I chose the buck version because I wanted to be able to maintain the lumens even on non full batteries.

Since I don’t configure the UI, the controls feels the same to me. I like it simple ramping like that.

Okay, so he converted the carrier to 12v for you? Then the buck driver runs at 6v? Interesting.

yea he modded the carrier to 4S

Jason the driver runs on 3S LED board and 13.5A
This is easier to convert from 6S v2 and more efficient more power
so about 130W wo the LEDs

I don’t understand what you mean.

Led board = mcpcb?
3S = the mcpcb is 3S6P so it needs 9 volts?
So the buck driver is 12v to 9v?
I thought that buck driver was limited to 6A at 12v or 9A at 9v. You are getting 13.5A to the emitters at about 11 actual volts?

I use a board with 2 Buck regulators at 6.75A

Cells will be side by side (2 up and 2 down next to each other)
Full name of the light is Haikelite MT03 II Devourer

What voltage is going to the leds?

I measured 9.57V on Turbo

Has it been tested?

And if so what is the outcome?

Okay, I had to refresh my memory and work this out.

The MF01 v1 had 3 groups of 2S3P = 6v with 3 built in drivers, one for each group of 6 leds. Used 6 wires to mcpcb.

The v2 was 6S3P where all 18 emitters were wired together and needed 18v. Used 2 wires to mcpcb.

So what you did was convert the 6S3P to 3S6P which needs 9 volts and uses 2 wires to mcpcb? Correct?

This method requires less changes on the mcpcb?

You don’t get a big boost in output, but maybe you go from 12k to 14k lumen (xpg3) and it’s consistent for a long time until it drops out of regulation. So it’s not a big upgrade, it’s just more reliable and has a better UI.

All this number crunching makes my head hurt. Lol

correct 3 cuts are made on the MCPCB 6S to 3S

The driver regulates output over the whole battery capacity pretty constant
I found recently a better p-channel MOSFET, which has less conducting and less switching losses, so I could increase the current a bit
But that FET has another footprint so new board would need to be made