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Power a laser with lead battery

irish303

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I have been wondering for a long time if it is possible to power a laser with a lead battery (max 12V - 5mhA, 3mhA, 2mhA)
So I turn the question over to you ...
 



Bryverine

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I'd like to say, "of course it is".

You would need to regulate voltage and current to the laser. I guess it really depends on your power requirements and the type of laser.

I guess I don't know what mhA is though... Can someone direct me to what this is a unit of?
Edit: nevermind... I guess I've always wrote/read mAh. I'm guessing this is it.
 
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irish303

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I'd like to say, "of course it is".

You would need to regulate voltage and current to the laser. I guess it really depends on your power requirements and the type of laser.

I guess I don't know what mhA is though... Can someone direct me to what this is a unit of?
Yes, in fact, then I can buy 7W -450nm laser modules powered at 12V, but I have to check their amperage.
At least with a lead-acid battery it's easier for now!
Building a laser pointer or something more challenging for now is not in my technical-constructive abilities
 

irish303

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Any laser driver that can operate at 12 volts will work.
As I said .... for now it is better to proceed with easy things to realize, then studying better your posts I will acquire some of that practice that now I don't have
 

paul1598419

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You needn't concern yourself with the current as the driver will only pull the current it needs. If you are using a 500 amp cranking power battery, it doesn't matter as long as the driver will operate at 12 volts.
 

Bryverine

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Yes, in fact, then I can buy 7W -450nm laser modules powered at 12V, but I have to check their amperage.
At least with a lead-acid battery it's easier for now!
Building a laser pointer or something more challenging for now is not in my technical-constructive abilities
For 7W, you would need a good supply of current like 2A+ is my guess (assuming 30% efficiency)... If you have a 5mAh battery you won't get much run time.
 

paul1598419

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Lead acid batteries don't come in such small current capacities.
 

Encap

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What are you meaning by "lead battery (max 12V - 5mhA, 3mhA, 2mhA)"?
What lead battery specifically are you talking about?

Do you mean mAh/miliamp hour/ 1/1000th of an amp hour or Ah/amp hour ----5, 3, 2 mAh is nothing and be of little if any use in powering a 7W 450nm diode and driver.
 

Light superglue

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Last edited:

paul1598419

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I used to have one of those small lead acid batteries in my home alarm system back in the 1990s. They are smaller than car batteries, but still have a high current capacity.
 

irish303

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Thank you so much for your answers ...!
The 7W of which I speak is similar to this : 1564301213289.png

Size: 7W
Technical Parameters:
Laser wavelength: 450nm blue laser
Spot type: dotted (adjustable)
Output power: 7W
Size: 2.5W(33*70mm) , 3.5W(33*70mm) 5.5W(40*70mm)
Drive mode: external ACC constant current drive
Cooling method: forced air cooling
Operating voltage: 12V DC The amperage is not specified ... strange
Control interface: 2 * 2.54 (TTL control switch, PWM control power)
Shell material: aluminum, surface anodized
Collimator lens: optical glass coating
PACKING LIST:
LASER*1
3PIN CABLE*1
3PIN TO 4PIN CABLE*1
SAFETY GLASSES*1



And I would like to feed it (given my inexperience in building one from scratch) with a 12V lead-acid battery (being a 7W-450nm) from ignorant I say, say 10Ah? may it be enough or will i go right right?1564301477027.png

12V 10AH Sealed Lead Acid Battery with T2 Terminals:
REPLACES: 26058, 6-DZM-10, CB10-12, CE5, CE6, MA 2.0 Lawn Mower, PSH-12100F2, REC10-12, S-180, S500, WP10-12S
Chrome Pro Battery SLA batteries are 'the workhorse of ALL batteries' and are constructed with lead calcium alloy and absorbed glass mat technology, which allows for completely 'maintenance-free' operation.

  • Dimensions: (H)4.37" x (L)5.94" x (W)2.56"
  • Weight: 7.5 lbs
  • Volts: 12
  • Watts: 120
  • Polarity: [+ -]
  • Terminal Type: T2
 

irish303

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No answer about my last quote?
Aren't YOUR questions / curiosities / insights of YOUR interest?
 

BowtieGuy

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I'm not completely sure what you're asking here, but that 12V battery shown in your above post is more than capable of powering that 7W diode module. (See Paul's post #6)

BTW, you won't always get an answer to your questions right away, it may be a few days, or more.
 

irish303

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Oh .... thank you so much BowtieGuy,
Then I am affixed :) I just have to proceed with the purchase!
Not having enough experience, I was impatient to know this news ... that's why we insisted!
 

irish303

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watch #12 post

Instead, my buil (so to speak) will be the purchase of this 7W laser module and this 12V - 10Ahm lead acid battery
Connect the cable + and the one - to the battery, maybe I'll insert a pressure switch or on / off and have fun!

When I have the necessary skills, maybe I will be able to do better!
 




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