M61 2x 18650 change in output, runtime, or both?

Hello all,

I did a bit of searching but couldn't really find a definitive answer, so I pose this question:

I recently purchased a Malkoff M61 with both an MD2 and MD4 body. I'm waiting for my 18650's to show up, so I've been running it on the MD2 body with 2xCR123.

If I were to run the M61 on 2x18650, would it affect the output? The answer I found made no mention of output, but said it would run for longer on 2x18650's, but be less efficient than if it were running on one.

Thanks in advance

-Adam :thumbsup:

It will not affect the output - voltage is still within 3.4-9V range (7.4-8.4V) so it's still regulated. Anything above would probably the module although I'm not inclined to try it on mine.:duh2:

You will get longer runtimes than a single 18650 obviously, I don't know how it chalks up to 2x or 3xCR123s though.

As for less efficiency with more than one battery.. I don't know, I'm not too clever with battery stuff. Maybe it's a li-ion peculiarity? On the other hand maybe someone was just guessing, I don't know. There's internal battery resistance which every battery has but unless it's a really bad battery it shouldn't make all that much difference.

I tried it on both 1 and 2 18650 cells and noticed no difference in lumens. Same thing. Trying to get an idea of runtime on 2x18650 Redilist 2900 mAh cells.

It does seem a little more efficient than the older M60. I have both. Especially on 1 cell.

runtime! I don't think you can use 4 cr123 cells in your md4 host.

Unclemonkey said:

runtime! I don't think you can use 4 cr123 cells in your md4 host.

Click to expand...

Nooooooooooo, 9v max input.

Thanks for all the input guys (see what I did there )

I have been running just that combo. Though I admit IMO M61 really shines in 1x18650 configuration. I am thinking about trying M61L in 2x18650 for some super runtime. Maybe even M61LL.