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Old 04-10-2011, 04:02 PM #1
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Default 200mW Green Laser and 2 AAA Batteries

I recently brought a 200mW green laser and it require two AAA alkaline batteries. My problem is the laser drains the batteries WAY TOO FAST! After about a minute of constant emission, the voltage deceased from 1.58 to about 1.51. After about two minute, my laser starts to lose its output power after few seconds after firing.

My questions is:
1. Is that actually normal?
2. Are there any way to mod the laser so it can provide longer life.


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Old 04-10-2011, 04:06 PM #2
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Default Re: 200mW Green Laser and 2 AAA Batteries

I bet you could rig up something fancy to allow two parallel 10440s instead of AAAs. That should get you longer life.
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Old 04-10-2011, 04:50 PM #3
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Default Re: 200mW Green Laser and 2 AAA Batteries

Hello and welcome to the forum!
Have you tried Hi quality NiMH rechargeables?
Also I hope you are really really careful with that thing.
200mW (er even 100mW in the likely reality of your pointer) is plenty enough to
mess up your eye for good, should you catch an accidental reflection.
Inside your house are many things that you didn't even know reflected light until
you shine a laser at them, so BE CAREFUL please.
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Old 04-10-2011, 05:07 PM #4
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Default Re: 200mW Green Laser and 2 AAA Batteries

Go to batteryjunction.com and get these:
Sanyo 1000mah AAA 2-pack NiMH Batteries

Best AAA batteries I have ever used.
They work great in all my pen lasers including my >175mW 532nm pen, no mod required.
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Old 04-12-2011, 03:31 PM #5
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Default Re: 200mW Green Laser and 2 AAA Batteries

Will those NiMH batteries works? For the laser, 2.8V is the trigger voltage and 3.2V is the working voltage. 2 NiMH batteries provide only 2.4V, making me uncertain.
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Old 04-12-2011, 06:46 PM #6
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Default Re: 200mW Green Laser and 2 AAA Batteries

^ yes, the nimhs will have a lower peak voltage but your laser is more current hungry than anything else. Nimhs will do a better job at providing the necessary current while the driver handles the voltage.
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Old 04-12-2011, 08:06 PM #7
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Default Re: 200mW Green Laser and 2 AAA Batteries

Quote:
Originally Posted by Invention View Post
Will those NiMH batteries works? For the laser, 2.8V is the trigger voltage and 3.2V is the working voltage. 2 NiMH batteries provide only 2.4V, making me uncertain.
Fully charged, my NiMH batteries are around 1.4V each. They are ~1.2V when it is time to recharge.
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Old 04-12-2011, 09:06 PM #8
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Default Re: 200mW Green Laser and 2 AAA Batteries

^1.2V under load



(from Google images. Ignore "useable limit" line)
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