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  1. #1
    Senior Member
    LKR42's Avatar

    Max. Battery Voltage for a D850

    Max. Battery Voltage for a D850
    Hi All,

    my D850 will be used in the polar region for timelapse photography and also for takiang videos of the Northern Lights. It will be veeeery cold, so I need a reliable power source.

    The camera is currently equipped with a EN-EL18a battery in a MB-D18 battery grip but I need to reduce the size/weight of the body. So I purchased an EP-5B dummy battery which can be connected to an external power source.
    Max. Battery Voltage for a D850-618pymuef7l._ac_sl1000_.jpg
    My power bank has a 5V USB-A, a USB-C with PD and an external port with 12-24VDC (which would be the easiest connection).

    Can the D850 handle 12VDC? I have read everything between 7.2V to 9.4VDC and even 12VDC was mentioned once - but I don't want to fry my camera...


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  2. #2
    Senior Member
    Bikerbrent's Avatar

    Re: Max. Battery Voltage for a D850

    Welcome aboard, enjoy the ride. We look forward to seeing more posts and samples of your work.

    You might also want to consider introducing yourself on New Member Introductions.

    Also, I can't help you with your question, but I am sure someone will be along shortly with some help.
    Best Answers LKR42 voted best answer for this post
     
    Brent: Poway, CA
    D7200, D200, F100
    Tokina 12-24mm
    Nikon 18-200mm
    Tokina 28-70mm f2.6-2.8
    Nikon 80-200mm f2.8
    Sigma 150-600mm
    Nikon 50 AF f1.8
    Tokina 100mm f2.8 Macro
    Nikon SB800

  3. #3
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    Marilynne's Avatar

    Re: Max. Battery Voltage for a D850

    Quote Originally Posted by Bikerbrent View Post
    ...
    You might also want to consider introducing yourself on New Member Introductions.
    ...
    He did, back in 2019.

    Welcome back.


  4. #4
    Staff
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    Marilynne's Avatar

    Re: Max. Battery Voltage for a D850

    Don't forget to post some of your shots when you get back.

  5. #5
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    hark's Avatar

    Re: Max. Battery Voltage for a D850

    I don't know of anyone here, but if you are on Facebook, my suggestion is to ask Wes Perry. He's an electrical engineer who posts about battery issues in a Godox Facebook group.

    https://www.facebook.com/wesperryphoto

    Or if you prefer YouTube, maybe consider reaching out to him there.

    https://www.youtube.com/c/WesPerry/featured
    Thanks/Like LKR42 Thanks/liked this post
     
    Cindy - D750, D500, D7200
    My 2022 Thread
    Where the Spirit does not work with the hand, there is no art
    -- Leonardo da Vinci


  6. #6
    Senior Member
    Needa's Avatar

    but I don't want to fry my camera...

    Another route would be to research the output of the AC adapter for the 850 that attaches to the EP-5B dummy battery. If you find the output of the Nikon version this would give you the optimum voltage.
    Thanks/Like nickt, LKR42 Thanks/liked this post
     

  7. #7
    Senior Member

    Re: Max. Battery Voltage for a D850

    I don't know the answer but if you are comfortable with electronics work, you could wire up a LM317T voltage regulator and a couple of resistors. They are cheap and very common. I'd stay conservative and configure it for 7.5v. That would be 1k and 5k ohm resistors. Other resister combinations would work too. You would want to test your work with a voltmeter before connecting it.
    Check what Needa said first and see what the intended adapter puts out.

    Will the camera operate in the intended temperature range?

    Here is a little info on the LM317.
    https://circuitdigest.com/calculator...age-calculator
    Thanks/Like LKR42, Needa Thanks/liked this post
    Best Answers LKR42 voted best answer for this post
     
    I must have a really good camera.

  8. #8
    Senior Member
    LKR42's Avatar

    Re: Max. Battery Voltage for a D850

    Quote Originally Posted by hark View Post
    ...ask Wes Perry. He's an electrical engineer who posts about battery issues in a Godox Facebook group.
    THanks for the link. I also have plenty of Godox stuff, so yet anoher reason to join that group...
    Thanks/Like hark Thanks/liked this post
     

  9. #9
    Senior Member
    LKR42's Avatar

    Re: but I don't want to fry my camera...

    Quote Originally Posted by Needa View Post
    Another route would be to research the output of the AC adapter for the 850 that attaches to the EP-5B dummy battery. If you find the output of the Nikon version this would give you the optimum voltage.
    As far as I know, the output of the Nikon power supply is 9.4VDC but I don't know whether there is any electronic stuff inside the original Nikon dummy. Mine is 3rd party and seems to be empty - but I haven't foun a way to openn the case...

  10. #10
    Senior Member
    LKR42's Avatar

    Re: Max. Battery Voltage for a D850

    Quote Originally Posted by nickt View Post
    ...you could wire up a LM317T voltage regulator and a couple of resistors.
    Electronics work are not a problem if I find a way to open the case of the dummy battery. So far I was thinking of a 7808 but a LM317 is even more flexible. I just have to check the heat load with long exposure or bulb operation.

    Will the camera operate in the intended temperature range?
    I beleive the D850's temperature range is much better than mine...
    Thanks/Like nickt Thanks/liked this post
     





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