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Thread: Battery Sizes.....

  1. #1
    Flashaholic*
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    Default Battery Sizes.....

    Anyone have a list? Example: What is the name of the battery that is the size of 2 123's?

  2. #2
    Flashaholic* Ra's Avatar
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    Thinking Re: Battery Sizes.....

    Sorry, I don't have a list...

    But the popular 18650-cell comes real close to 2 123's..

    TIP: Ask AW.. the battery seller on CPF !!
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  3. #3

    Default Re: Battery Sizes.....

    This List from the CPF Wiki may help
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  4. #4

    Default Re: Battery Sizes.....

    Quote Originally Posted by Doug
    Anyone have a list? Example: What is the name of the battery that is the size of 2 123's?
    I want to say it's called a 223, but I'm not sure.

  5. #5
    Flashaholic* Ra's Avatar
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    Ohgeez Re: Battery Sizes.....

    Didn't know about that list...

    according to that list the 17680 and 17670 are 2xCR123 in size...


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  6. #6
    Flashaholic* Long John's Avatar
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    Default Re: Battery Sizes.....

    I don't know about the 123's. But for the others:

    The first two numbers are the diameter, for example 18650=18 mm,
    the next two are the lenght=65mm and the 0 for round.

    So the 18650 should be a little bigger(1mm) than the 17670.

    Best regards

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    Tom
    Last edited by Long John; 08-28-2006 at 07:25 PM.

  7. #7
    Flashaholic*
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    Default Re: Battery Sizes.....

    cr123a cells are actually something like 16340? I'm pretty sure. AW has it in his battery sale thread in the dealer's section if you REALLY want to know.

  8. #8
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    Default Re: Battery Sizes.....

    The 123A nomenclature indicates that it is 1 cell that is 2/3 the length of an A cell. A cells are around 50 mm in length and are 17 mm in diameter and are round. That means that a 123A cell should be similar to a 17340 ( I believe it actually works out to 33.33 mm in length). In theory, two of these would be a 17670.

    Tom
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  9. #9
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    Default Re: Battery Sizes.....

    Ok, great guys, so, 17650/17670 it sounds like... but what about the voltage, I assume it should be 2x3.7=7.2, right? Also, what chargers are capable of charging CR2's, 123's and theses 17650/17670's? Thanks!

  10. #10
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    Default Re: Battery Sizes.....

    Hello Doug,

    The 17670 is the size of one Li-Ion battery. It will have a nominal voltage of 3.7 volts and be charged up to a maximum voltage of 4.2 volts. This single battery just happens to be the size of two CR123A cells in length.

    Tom
    Behind every Great man there's always a woman rolling her eyes...

    Most batteries don't die - they are tortured to near death, then murdered...

  11. #11
    Flashaholic*
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    Default Re: Battery Sizes.....

    Oh! So, you loose voltage, so, I am better off using 2 RCR123's, to get the higher voltage, eh? As long as they are protected, right? No issues with using 2 RCR123's, right? What about theses 900ma ones, any issues with them?
    Last edited by Doug; 08-28-2006 at 11:05 PM.

  12. #12
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    Default Re: Battery Sizes.....

    Hello Doug,

    You have to determine if your light can handle higher voltages. Sometimes they burn out because they aren't designed to handle the higher voltages.

    Keep in mind that 2 CR123A cells give you around 6+ volts, where as 2 R-CR123A cells come off the charger at 8+ volts.

    For example, the SureFire L4, and perhaps the U2 as well, can not handle the extra voltage, however they work just fine on one cell.

    Tom
    Behind every Great man there's always a woman rolling her eyes...

    Most batteries don't die - they are tortured to near death, then murdered...

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