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Thread: Nuwai ALX352L FLuPIC TW0J 18650 mod

  1. #1
    Flashaholic* chimo's Avatar
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    Default Nuwai ALX352L FLuPIC TW0J 18650 mod

    I purchased a dead ALX352L some time ago with the intention of modding it. The original driver circuit had a couple of blown MOSFETs due to a shorted output.
    This host was a 5W, 2x CR123 but I have modified it to accept 18650 cells that were pulled from some laptop battery packs.

    I started by creating a board that aould have the positive and negative battery contacts. This board also contains a Q3 switch embedded to the correct height for button contact.


    Random Battery shot - note the extra height of the Protected R123!


    Note how good a fit the 18650 is for 2x CR123 replacement.


    The Tube was bored out to accept the 18650. Lots of wall thickness left.


    Beam Shot Low/Medium


    Side by side. Nuwai with MiniMag


    Paul
    Last edited by chimo; 05-07-2006 at 06:53 PM.

  2. #2
    Flashaholic* LumenHound's Avatar
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    Default Re: Nuwai ALX352L FLuPIC TW0J 18650 mod

    Very nice!

    How warm does the body get after 10 minutes on the the FLuPIC's 20/20 high setting and how much current is it drawing?

    That reflector is about 34 mm wide, right?

  3. #3
    Flashaholic* chimo's Avatar
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    Default Re: Nuwai ALX352L FLuPIC TW0J 18650 mod

    Thanks Lumenhound.

    That thing has a ton of thermal mass so the body just gets slightly warm.
    I believe on High Mode (20/20) there is only one LDO regulator turned on and that limit's the output to about 550-600mA. The Luxeon is under-driven until the FLuPIC is switched to Max. On Max Brightness, both LDOs are turned on for 1.1-1.2Amps to the Luxeon.

    Between High and Max, my eyes do not see a great difference in output, but the light meter does.

    I like the reflector - it's partly OP'd and produces a nice beam. I don't have the light handy right now to measure it.

    Paul

  4. #4
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    Default Re: Nuwai ALX352L FLuPIC TW0J 18650 mod

    Very nice mod indeed! Now if we could get some runtime graphs...

  5. #5
    Flashaholic* chimo's Avatar
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    Default Re: Nuwai ALX352L FLuPIC TW0J 18650 mod

    Quote Originally Posted by goldserve
    Very nice mod indeed! Now if we could get some runtime graphs...
    That's kind of funny, I started one yesterday, but stopped it when I did not recall what level I had "High" set at.

    Paul

  6. #6
    Flashaholic* chimo's Avatar
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    Default Re: Nuwai ALX352L FLuPIC TW0J 18650 mod

    Here's a quick runtime from an 18650 pulled from an old laptop battery pack.
    The setting should be at level 20 (one LDO ~ 550-600mA). Just over 2.5hrs to 50%.

    On Max setting (both LDOs) the output is over 4000 Lux @ 1m!




    Lumenhound, the reflector is 32mm dia.

    Paul

  7. #7
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    Default Re: Nuwai ALX352L FLuPIC TW0J 18650 mod

    Very nice graph. What are you using to log the runtime? A few other questions:

    Are you using two 18650s in parallel or just one?

  8. #8
    Flashaholic* chimo's Avatar
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    Default Re: Nuwai ALX352L FLuPIC TW0J 18650 mod

    Quote Originally Posted by goldserve
    Very nice graph. What are you using to log the runtime? A few other questions:

    Are you using two 18650s in parallel or just one?
    Thanks ,
    I use a ProteK 608 connected to my Meterman LM631 for graphing. I import the data and graph it in Excel.

    The runtime is with one 18650 - recovered from a laptop battery pack that was being discarded. There is no indication of mAh on the cell.

    Paul

  9. #9

    Default Re: Nuwai ALX352L FLuPIC TW0J 18650 mod

    i need to do a new circuit to work with 18650 because needs more space?

  10. #10
    Flashaholic* chimo's Avatar
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    Default Re: Nuwai ALX352L FLuPIC TW0J 18650 mod

    Quote Originally Posted by marcos7007
    i need to do a new circuit to work with 18650 because needs more space?
    I'm sorry but I am not sure what you are asking. The 18650 is the same length as 2x CR123s so the circuit board position will not change. I changed circuit boards to the FLuPIC.

  11. #11

    Default Re: Nuwai ALX352L FLuPIC TW0J 18650 mod

    because in alx352l go 17650 / 70 = 168S or 600S

    and not
    18650 = 168A or 600A
    did you make any mod to accept 600a instead 600s


    http://flashlightreviews.com/features/pila_table.htm

  12. #12
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    Default Re: Nuwai ALX352L FLuPIC TW0J 18650 mod

    Quote Originally Posted by marcos7007
    because in alx352l go 17650 / 70 = 168S or 600S

    and not
    18650 = 168A or 600A
    did you make any mod to accept 600a instead 600s


    http://flashlightreviews.com/features/pila_table.htm
    Well he bored out the body.

    The only physical difference b/w 18650 and 17650 is the 1 mm extra diameter. Both have the same length @ 65 mm.

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