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FrozenGate by Avery

5W laser from a 18650 battery? Can it be true?

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The laser seems legit. 5Watt IR lasers do exist but the the beam and dot isn't visible. It is a pure burner.
 
Surely. However for that price it would be better to mention what diode amperage is and what is its efficiency. Without these, we can only speculate, or rely on some purchaser's review.
 
You can buy it and test it for us :)

I don't know what efficiency has to do with 5Watt laser. It is more useful with green lasers.
 
Its an IR laser. You must be very careful with them, as you cant easily see the beam or dot. Your eyes arent sensitive enough to that wavelength of light and so it doesnt seem that bright, this also means your blink reflex wont function properly...

If you mess up with 5 W of IR a retina could easily be toast...

Edit: I dont get the "Safe" bit in their description :thinking:
 
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I meant diode efficiency, sorry for confusion. You know, knowing the diode amperage & percentage efficiency would enable us to calculate real power :)

About safety -well, laser is as safe as a gun. The only unsafe element is human being, and from him depends if he use it properly.

But going back again with that battery supplied, I suppose it wouldn't burn long? Any way to estimate its power-on-battery time? (not duty cycle)
 
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btc5 said:
I meant diode efficiency, sorry for confusion. You know, knowing the diode amperage & percentage efficiency would enable us to calculate real power :)

About safety -well, laser is as safe as a gun. The only unsafe element is human being, and from him depends if he use it properly.

But going back again with that battery supplied, I suppose it wouldn't burn long? Any way to estimate its power-on-battery time? (not duty cycle)
Click to expand...

A while ago I built a >2W 808nm laser. It was powered by 1 18650 running at 2.8A and ~2.2V on 8 AMC7135 regulators in parallel. It produced a lot of heat and drained the battery quickly. I would estimate ~15 minutes.

A 5W diode needs >5A and 2.2V. Can an 18650 supply 11W of power to this diode?
And the host will need to move >6W of heat.
 
eytyxhs said:
They run by 26650 Cell! Where you saw 18650? :thinking:
Click to expand...

Where do read about the 26650 cell?

The description clearly says 1x 18650

Ok, I see, there is a 26650 cell in one of the pictures.
 
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eytyxhs said:
They run by 26650 Cell! Where you saw 18650? :thinking:
Click to expand...


Specification :
(1) High Power 5W IR laser pointer
(2) Wavelength: 808nm
(3) Battery: 1 X18650
(4) Dimension :40x 228mm
(5) Output power: >4.0W
(6) Transverse Mode: TEMoo
(7) Switch: Constant on/off button
(8) Expected Lifetime: > 8,000 hours
(9) Body Material: Brass
Click to expand...

Says 18650.
So which is it?
 
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Looks like a 22650 from the scale of the picture.
 
ARGLaser said:
Looks like a 22650 from the scale of the picture.
Click to expand...

Well, yes... but what battery is the laser supposed to operate on?
I don't think a single 18650 can do the job so it must be 26650.

I don't have experience using 26650 batteries so I can't say how well it would hold up with a diode that needs 11W plus losses in the driver.
 
If you look at the battery cell . . .

it is a 26650 IMR cell which can easily deliver 6 amps.

A switching buck driver could run on a #18650 @ ~3 amps.

I have also drawn 6 amps from 3400mah 18650 cells.

LarryDFW
 
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