PentagonLight MX-2 IR illuminator batteries?

bstrickler · May 31, 2012

I recently purchased a PentagonLight MX-2 with IR module, and was wondering what batteries the IR module takes. I can't seem to find any documentation or forum posts giving any information about that. I know the light uses a P60 module, and uses CR123's, but the IR module's battery requirements eludes me. It looks like it uses 4x LR44 or 2x CR1/3N batteries, but I don't have any on hand to try out.

eg1977 · Jun 21, 2012

544 battery

bstrickler · Jun 23, 2012

Thanks. Bought 4 LR44 (same thing as a 544), and the illuminator either doesn't work, or its 900+ nanometer wavelength.

Norm · Jun 23, 2012

Have you tried viewing the light using a phone camera or similar?

Norm

bstrickler · Jun 23, 2012

Norm said:
Have you tried viewing the light using a phone camera or similar?

Norm

Yes, hence the suspicion that it's in the 900+nm wavelength. Tried with multiple cameras. If I had the program to use the camera for the Wii remotes, I'd see if that could see the IR.

I'll try getting a hold of a friend with some NVG's, and see if they can let me borrow them for 30 seconds.

PCC · Jun 23, 2012

With the four LR44 batteries did you electrically isolate them? Wrap them in paper or tape?

bstrickler · Jun 23, 2012

PCC said:
With the four LR44 batteries did you electrically isolate them? Wrap them in paper or tape?

Yep. Inside is anodized, too, so there shouldn't be a problem with continuity/shorting.

PCC · Jun 23, 2012

Since pictures of the 544 batteries that I've seen show a button top, is it possible that you're not getting positive contact at the top of the stack?

bstrickler · Jun 23, 2012

PCC said:
Since pictures of the 544 batteries that I've seen show a button top, is it possible that you're not getting positive contact at the top of the stack?

Not an issue. No button top needed. Positive node is a short spring, sticking out about 2-3mm above the board. Tried wrapping 4 cells in electrical tape, and manually apply the voltage, but still got nothing, so only 2 things it can be: Blown IR diode, or a 940nm diode. I'm placing my bets on it being 940, since it's supposed to be military grade.

I'll take pics of the piece when I get home later.

PentagonLight MX-2 IR illuminator batteries?

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