Cr2 replacement !!! Urgent !!

• Apr 8, 2012

• #1

Keiichi tsuchiya

0

Joined

Mar 16, 2012

Messages

319

Points

18

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

 

• Apr 8, 2012

• #2

AnthoT

0

Joined

Jan 14, 2012

Messages

2,133

Points

48

CR2 batteries= 3.7V
AA batteries = 1.5V

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

-Anthony

 

• Apr 8, 2012

• #3

ARG

0

Joined

Feb 27, 2011

Messages

6,772

Points

113

Solution: Buy rechargeable CR2's.

Or get these for 1.2$ each...
Panasonic CR2 5-Pack - Free Shipping - DealExtreme

 

• Apr 8, 2012

• #4

AnthoT

0

Joined

Jan 14, 2012

Messages

2,133

Points

48

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

-Anthony

 

• Apr 9, 2012

• #5

Keiichi tsuchiya

0

Joined

Mar 16, 2012

Messages

319

Points

18

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 ??

 

• Apr 9, 2012

• #6

Keiichi tsuchiya

0

Joined

Mar 16, 2012

Messages

319

Points

18

So basically ... If im able to fit the 2AA batteries .. Will it work?? ...( thanks)

 

• Apr 9, 2012

• #7

RA_pierce

0

Joined

Sep 16, 2007

Messages

3,658

Points

113

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: Apr 9, 2012

• Apr 9, 2012

• #8

AnthoT

0

Joined

Jan 14, 2012

Messages

2,133

Points

48

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

-Anthony

 

• Apr 9, 2012

• #9

Keiichi tsuchiya

0

Joined

Mar 16, 2012

Messages

319

Points

18

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 !!!!

 

• Apr 11, 2012

• #10

BShanahan14rulz

0

Joined

Dec 29, 2009

Messages

3,136

Points

63

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.