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Thread: TK75 new version simple unboxing .more lumens but a some trade off to the old version

  1. #1
    Flashaholic den331's Avatar
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    Default TK75 new version simple unboxing .more lumens but a some trade off to the old version

    got my new TK75 =)




    XML-U2. perfectly flawless reflector





    my other torch



    and this is the trade off. Tk75 owners version 1 will definitely will notice the trade off this new version
    Last edited by den331; 01-07-2014 at 06:25 PM.

  2. #2
    Flashaholic* moshow9's Avatar
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    Default Re: TK75 new version simple unboxing .more lumens but a some trade off to the old ver

    Is it the use of 18650 batteries? If so, sounds like Fenix wants users to spend on their batteries over other brands.
    Click Here to view my lights

  3. #3
    Flashaholic den331's Avatar
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    Default Re: TK75 new version simple unboxing .more lumens but a some trade off to the old ver

    Quote Originally Posted by moshow9 View Post
    Is it the use of 18650 batteries? If so, sounds like Fenix wants users to spend on their batteries over other brands.
    nope its the runtime step down

  4. #4
    Flashaholic* NorthernStar's Avatar
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    Default Re: TK75 new version simple unboxing .more lumens but a some trade off to the old ver

    Just like you, i noticed the shorter burntime before stepdown in the manual on my TK75-L2(the new XM-L2 version). Iīve tested running the light on turbo and measured the time on a stopwatch before stepdown, and my torch step down from turbo to high after exactly 16 minutes. I did the test by having the light tailstanding on a table and had it set on turbo, so no extra cooling was added.

    Totaly i had 3x16 minutes intervals on turbo and then almost another full interval before the light no longer could keep turbo mode and instantly stepped down to high mode. Iīve got just beneath 60 minutes of turbo mode totaly. I am using 4x18650 3400 mAh batteries.

    Since i donīt have the original TK75 i canīt compare with it,but i donīt know why the upgraded TK75 have shorter turbo mode than itīs predecessor?
    LED: Olight I1 EOS,Olight S1,S1R,S2,S10R,S10RII,S15R,S20R,S30R,S30RII,S30R Javelot,Nitecore SRT7,Sunwayman V20C,Sunwayman R10A,FourSevens Atom AL,Fenix TK75 2015,Crelant CH10, and more

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    *Flashaholic* kj2's Avatar
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    Default Re: TK75 new version simple unboxing .more lumens but a some trade off to the old ver

    Quote Originally Posted by moshow9 View Post
    Is it the use of 18650 batteries? If so, sounds like Fenix wants users to spend on their batteries over other brands.
    Of course they want to...

  6. #6
    Flashaholic den331's Avatar
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    Default Re: TK75 new version simple unboxing .more lumens but a some trade off to the old ver

    What battery you using? I tested mine i got exactly 16 minutes before stepping down to high. And also i got 3 accumulated turbo before the light can no longer sustain turbo. At first step down i measured the voltage its around 3.90v for just 16 minutes of turbo. It consumes lots of juice on my ncr18650B
    Quote Originally Posted by NorthernStar View Post
    Just like you, i noticed the shorter burntime before stepdown in the manual on my TK75-L2(the new XM-L2 version). Iīve tested running the light on turbo and measured the time on a stopwatch before stepdown, and my torch step down from turbo to high after exactly 16 minutes. I did the test by having the light tailstanding on a table and had it set on turbo, so no extra cooling was added.

    Totaly i had 3x16 minutes intervals on turbo and then almost another full interval before the light no longer could keep turbo mode and instantly stepped down to high mode. Iīve got just beneath 60 minutes of turbo mode totaly. I am using 4x18650 3400 mAh batteries.

    Since i donīt have the original TK75 i canīt compare with it,but i donīt know why the upgraded TK75 have shorter turbo mode than itīs predecessor?
    Last edited by den331; 01-02-2014 at 09:10 AM.

  7. #7
    Flashaholic* NorthernStar's Avatar
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    Default Re: TK75 new version simple unboxing .more lumens but a some trade off to the old ver

    Quote Originally Posted by den331 View Post
    What battery you using? I tested mine i got exactly 16 minutes before stepping down to high. And also i got 3 accumulated turbo before the light can no longer sustain turbo. At first step down i measured the voltage its around 3.90v for just 16 minutes of turbo. It consumes lots of juice on my ncr18650B
    I use Pure Power 3400 mAh batteries.


    Unfortunately i donīt have any equipment to measure the voltage of the cells, but this light indeed consumes lots of juice!
    LED: Olight I1 EOS,Olight S1,S1R,S2,S10R,S10RII,S15R,S20R,S30R,S30RII,S30R Javelot,Nitecore SRT7,Sunwayman V20C,Sunwayman R10A,FourSevens Atom AL,Fenix TK75 2015,Crelant CH10, and more

  8. #8
    Flashaholic den331's Avatar
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    Default Re: TK75 new version simple unboxing .more lumens but a some trade off to the old ver

    maybe pure power is using panasonic cells my ncr18650b is also 3400mah. also after the first step down 16 minutes when i go back to turbo and turn the light off and turn it back on it resumes on high not on turbo. and i tried 2 fully charged sanyo's it resumes to turbo . i think it dosen't want to resume on turbo when the light is turned on because the voltage per cell is around 3.90-3.80v per cell
    Quote Originally Posted by NorthernStar View Post
    I use Pure Power 3400 mAh batteries.


    Unfortunately i donīt have any equipment to measure the voltage of the cells, but this light indeed consumes lots of juice!

  9. #9
    Flashaholic* NorthernStar's Avatar
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    Default Re: TK75 new version simple unboxing .more lumens but a some trade off to the old ver

    Quote Originally Posted by den331 View Post
    maybe pure power is using panasonic cells my ncr18650b is also 3400mah. also after the first step down 16 minutes when i go back to turbo and turn the light off and turn it back on it resumes on high not on turbo. and i tried 2 fully charged sanyo's it resumes to turbo . i think it dosen't want to resume on turbo when the light is turned on because the voltage per cell is around 3.90-3.80v per cell
    I think itīs Panasonic cells in the Pure Power batteries. When reading all reviews of the old TK75 it had 3x21 minutes intervals on turbo mode until it could no longer resume turbo mode. Obviously there is a small trade off by about 4-5 minutes of shorter burntime for each intervals on turbo mode with the new version compared to the old version.
    LED: Olight I1 EOS,Olight S1,S1R,S2,S10R,S10RII,S15R,S20R,S30R,S30RII,S30R Javelot,Nitecore SRT7,Sunwayman V20C,Sunwayman R10A,FourSevens Atom AL,Fenix TK75 2015,Crelant CH10, and more

  10. #10

    Default Re: TK75 new version simple unboxing .more lumens but a some trade off to the old ver

    It would be interesting to see what would happen if you put an extension on tk75 and run it with 8 cells.

  11. #11
    *Flashaholic*
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    Default Re: TK75 new version simple unboxing .more lumens but a some trade off to the old ver

    If you burn brighter, its like flooring the gas in your car, it cuts the mpg....and makes more heat, etc.

    So, sure, if you get more lumens, you get more heat. The step down is to protect from the heat. Adding cells can extend the run time, but should not change how much heat the system is producing on turbo.


  12. #12

    Default Re: TK75 new version simple unboxing .more lumens but a some trade off to the old ver

    Was given one of these for Christmas and I was very impressed with light output. I'm running 3400 panasonic batteries and Tenergy 2600 with no issues.

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