NUBM44 9mm 6W diode

Just a quick question on powering the nubm44 diode, what Batterys will power it? Will it have to be a 26650 build ?? Thanks in advance lads

The size of the battery, such as 26650, 18650, or 14500 to name a few, does not matter. What really matters is the voltage and mAh ratings of the battery. As long as the batteries can supply enough voltage and the current draw does not exceed the mAh rating of the battery, you should be fine. When the batteries are connected in series, voltage stacks but mAh remains the same. When batteries are connected in parallel, mAh stacks but voltage remains the same.

thebouljello said:

The size of the battery, such as 26650, 18650, or 14500 to name a few, does not matter. What really matters is the voltage and mAh ratings of the battery. As long as the batteries can supply enough voltage and the current draw does not exceed the mAh rating of the battery, you should be fine. When the batteries are connected in series, voltage stacks but mAh remains the same. When batteries are connected in parallel, mAh stacks but voltage remains the same.

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Ok cool thanks for the advice bud appreciate it

You also want enough battery that your voltage won't sag below 6.8v so your driver will work properly, assuming you are using the excellent SXD.

2 Good quality IMR or INR 18650's will work but I like using 3 good IMR 26650's for longer run times. I like EFest and Basen.

The NUBM44 with SXD driver set at 4.5 amps will draw 24 watts, so with 2 cells at 8 Volts the draw is 3 amps, 3 cells at 12 volts the draw is 2 amps, but remember that's fully charged, so as the 3 cells discharge they can still make the grade, 2 cells will need to be recharged earlier.

thebouljello said:

and the current draw does not exceed the mAh rating of the battery

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mAh is a rating of capacity not the discharge capabilities of the cell. If a cell is 3000mAh that means that if it had a current draw of 1A it would take 3 hours to fully discharge before needing to be recharged. Many less quality cells have very bogus capacity ratings and shopping based on capacity ratings usually ends up with buying a very poor quality cell or even a dangerous one.

The max safe discharge will be a "C" rating which is multiplied by the capacity(mAh). Take for example AW IMR 18350 cells. They have a 8C discharge rating so you take 8X800 and you get a max safe discharge of 6400mA or 6.4A. If in reality a cell has only a 0.5C rating and you are only looking at capacity(and it is actually accurate) you may be trying to draw more than the cells can handle.

The main things to do when shopping for Li-ions is to buy from a reputable dealer avoiding ebay, amazon, etc... Don't shop solely for capacity but match up the specs for the current draw of your application.:beer:

DTR said:

. Many less quality cells have very bogus capacity ratings and shopping based on capacity ratings usually ends up with buying a very poor quality cell or even a dangerous one.

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So your telling me that the 6000mah rating on my crapfire 18650s isn't true?

It always gets me when I see outrageous mah claims, I recently saw a 16340 with a rating of 4000mah- dang that's a super battery!!:wtf:

CaliKirk said:

So your telling me that the 6000mah rating on my crapfire 18650s isn't true?

It always gets me when I see outrageous mah claims, I recently saw a 16340 with a rating of 4000mah- dang that's a super battery!!:wtf:

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Indeed. I always base my battery decisions on the battery tests of lygte-info.dk. They have tested almost every common Li-ion battery. Really reliable information. :beer:

Sta said:

Indeed. I always base my battery decisions on the battery tests of lygte-info.dk. They have tested almost every common Li-ion battery. Really reliable information. :beer:

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Thanks for sharing that!! I'll have to bookmark that site for my next battery purchase.

if you look for the highest rated capacity for the size of battery on eBay, you will propbably find a liefire battery listed.

Alaskan said:

if you look for the highest rated capacity for the size of battery on eBay, you will propbably find a liefire battery listed.

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What really boggles my mind is when people are asking what is wrong with their high powered laser. The symptoms end up that it's cutting out, flashing or just stopped working all together and then when asked about fully charged batteries - they respond with "Yes I have 6000mah 18650 crapfires and they are charged"

Thank you all for the replys, exactly the advice I'm looking for !! Still learning lads, thanks a mil ����

I have had no isues with the LG INR18650MJ1 3500 mAh High Discharge batteries. Not sure about logistics but this is where i get all my batteries 18650 LG INR18650MJ1 3500mAh High Discharge - Batteries - Batteries, Chargers, and PowerPax Carriers