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Old 04-08-2012, 10:20 PM #1
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Default Cr2 replacement !!! Urgent !!

Hello guys !! I have a 100mw green laser and this thing eats up the batteries !!! In 3 days the batteries are gone ! And without abusing !!): so my question is .. Can i use two AA batteries instead of one cr2 battery!!??
Cr2 batteries are really !! Really !! Expensive !! For 10bucks i buy 4 cr2 and for 10 i buy like a pack of 25 at home depot !! So if i can use the AA Batteries .. It would be a huge save (; lol


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Old 04-08-2012, 10:24 PM #2
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Default Re: Cr2 replacement !!! Urgent !!

CR2 batteries= 3.7V
AA batteries = 1.5V

So you can't unless you can fit 2 or 3 AAs in your lasers host.

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Old 04-08-2012, 10:34 PM #3
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Default Re: Cr2 replacement !!! Urgent !!

Solution: Buy rechargeable CR2's.

Or get these for 1.2$ each...
Panasonic CR2 5-Pack - Free Shipping - DealExtreme
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Old 04-08-2012, 10:38 PM #4
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Default Re: Cr2 replacement !!! Urgent !!

Or these Rechargeable 3V CR2 800mAh Green (Pair) - Free Shipping - DealExtreme
Those are 3.80$ for two and they are rechargeable.

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Old 04-08-2012, 11:07 PM #5
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Default Re: Cr2 replacement !!! Urgent !!

Well actually the cr2 batteries that i have are 3.0v not 3.7v..
So lets say that im able to fit the two AA batteries ... Will it work?? Or i will screw up the laser ??
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Old 04-08-2012, 11:08 PM #6
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Default Re: Cr2 replacement !!! Urgent !!

So basically ... If im able to fit the 2AA batteries .. Will it work?? ...( thanks)
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Old 04-08-2012, 11:38 PM #7
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Default Re: Cr2 replacement !!! Urgent !!

I doubt you can fit 2 AA batteries in a laser that accepts 1 CR2.
As others said, get the rechargeable batteries.

In the future consider getting a laser that uses CR123A or 18650 batteries. Both have much better capacity than CR2s.

Last edited by RA_pierce; 04-08-2012 at 11:44 PM.
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Old 04-08-2012, 11:43 PM #8
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Default Re: Cr2 replacement !!! Urgent !!

But if you somehow end up fitting two AAs or two AAAs it would work also... Even though I really doubt it

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Old 04-09-2012, 12:07 AM #9
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Default Re: Cr2 replacement !!! Urgent !!

Allright !! I will figure out what to do .. Ithink that i will buy rechargeable ones once i beat the other 2 left thati have cause im ising the third one of the four that i bought lol !! Thanks anyway !!!!
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Old 04-11-2012, 04:46 PM #10
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Default Re: Cr2 replacement !!! Urgent !!

Some rechargable ones have voltage dropping diodes so that their actual presented nominal voltage is closer to 3V. You will have to consult with the seller to see if they have a special charger for them, as sometimes this is actually due to a different electrochemical makeup inside the cell instead of just added circuitry.
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