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Thread: Does the 26650 size fit a C cell mag diameter wise?

  1. #1

    Default Does the 26650 size fit a C cell mag diameter wise?

    Here is the cell: http://www.batteryspace.com/index.as...OD&ProdID=4796

    25500 is the exact size of a C cell but are not LiFePO4 safe chemistry: http://www.dealextreme.com/details.dx/sku.5035

    I'm not worried about the extra length only the diameter. Would 26mm be too wide? It states DO NOT remove paper insulator!
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  2. #2
    Flashaholic* Flash_Gordon's Avatar
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    Post Re: Does the 26650 size fit a C cell mag diameter wise?

    Those cells are 27.1mm with the cardboard sleeve. That is 1mm larger than a standard alkaline C cell. I think they will fit in a Mag.

    Drop some C cells in your Mag and eyeball to see if you have the room. Or take some duct tape and wrap a C cell up to 27mm and do a positive test.

    Mark

  3. #3

    Default Re: Does the 26650 size fit a C cell mag diameter wise?

    I just measured the I.D. of the C-cell Mag and it is exactly 26mm.

    That 25500 cell would fit perfectly if that picture of the digital caliper is precise.
    Last edited by RunningDave; 02-17-2009 at 10:51 PM.

  4. #4

    Default Re: Does the 26650 size fit a C cell mag diameter wise?

    Flash,

    I've decided to get the IMR26500 C cells from AW: http://www.cpfmarketplace.com/mp/sho...d.php?t=184887

    The length is 50mm & width 26mm, which is the normal C size. These LiFePO4 are 65mm long which are an odd length for me.
    Last edited by john2551; 02-18-2009 at 06:03 AM.
    Primary duty lights: (metal) Elektrolumens Pentalux 4C; (polymer) Pelican M8 LED; (hybrid) StreamLight 3C-XP
    Searchlight: AE PowerLight PL14
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    Special LED signaling lights: Torfino ICE light, Inova 24/7, Adventurelights VIP

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    Lightbulb Re: Does the 26650 size fit a C cell mag diameter wise?

    Quote Originally Posted by john2551 View Post
    Here is the cell: http://www.batteryspace.com/index.as...OD&ProdID=4796

    25500 is the exact size of a C cell but are not LiFePO4 safe chemistry: http://www.dealextreme.com/details.dx/sku.5035

    I'm not worried about the extra length only the diameter. Would 26mm be too wide? It states DO NOT remove paper insulator!
    I purchased some 3200mAh 3.2V 26650 LiFePO4 cells from K2 Energy:

    http://store.peakbattery.com/lfp26.html

    K2 claims these are 26.2mm dia but the ones I received had cardboard sleeves at 26.7mm and will not fit my C Mag unless I remove the sleeve.

    F.Y.I. I noticed a power tool battery rebuilding service selling GD brand 3000mAh 3.7V 26650 Manganese dioxide (IMR) based Lithium batteries:

    http://www.voltmanbatteries.com/serv...ES-A123/Detail

    They claim to be 26.4mm dia.
    Last edited by nicknich22931; 03-28-2009 at 11:37 AM. Reason: mistake
    Nick Nichols, Covesville, VA, USA 22931
    bored and cut C M*G 26650 battery tubes http://www.candlepowerforums.com/vb/...d.php?t=232420

  6. #6
    Flashaholic Turbo Guy's Avatar
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    Default Re: Does the 26650 size fit a C cell mag diameter wise?

    I use 26650 LiFePO4 cells in two MagLights. I removed the cardboard sleeves and applied heatshrink on the cells. They fit fine in my 5C light . Note I only use two of these cells to power a TLE-6EX drop in. You will need 4" (160 mm) heatshrink. Heatshrink will shrink a bunch so 4-1/2 or 180-200 mm will work. A a hair dryer will work to shrink it.

    My heat shrinked cells 1.033-1.038" dia. A123System cells with cardboard sleeves 1.060 and they are to big.
    Last edited by Turbo Guy; 03-28-2009 at 12:21 PM.
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  7. #7
    Flashaholic* eebowler's Avatar
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    Default Re: Does the 26650 size fit a C cell mag diameter wise?

    Can anyone tell me if the new 4sevens 26650 cells fit in a C size maglite without modification? Thanks.
    When was the last time you washed your feet?

  8. #8
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    Lightbulb Re: Does the 26650 size fit a C cell mag diameter wise?

    Quote Originally Posted by eebowler View Post
    Can anyone tell me if the new 4sevens 26650 cells fit in a C size maglite without modification? Thanks.
    I asked 4sevens the following question:

    "Also, Can you give me the specs as to length and width of the 26650 cells you sell? Since they have a protection circuit they may be too wide and long to fit my lights. As far as I know, you are the only one selling protected 26650 cells."

    their answer:

    "The 26650 is 1.044" D X 2.75" L"

    Note: 1.044" = 26.52mm, 2.75" = ​69.85mm
    Last edited by nicknich22931; 06-03-2012 at 06:58 AM. Reason: more info
    Nick Nichols, Covesville, VA, USA 22931
    bored and cut C M*G 26650 battery tubes http://www.candlepowerforums.com/vb/...d.php?t=232420

  9. #9
    Flashaholic* eebowler's Avatar
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    Default Re: Does the 26650 size fit a C cell mag diameter wise?

    Thank you nicknich!
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  10. #10
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    Default Re: Does the 26650 size fit a C cell mag diameter wise?

    Anyone who tried 26650 in a Mag C yet? I now use it with 3xCR123 in a tube. The tube is exactly 26mm and suits with a very small margin.
    Last edited by Swedpat; 07-23-2012 at 03:26 AM.
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  11. #11
    Flashaholic* fivemega's Avatar
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    Default Re: Does the 26650 size fit a C cell mag diameter wise?

    I have never seen any 26xxx fit in unbored M*g "C" but all 25xxx will fit in diameter.

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