+ Reply to Thread
Page 1 of 2 12 LastLast
Results 1 to 10 of 14
  1. #1
    Senior Member
    ckm's Avatar

    Why Not Charge Off USB

    Do any of the current-model Nikon DSLR's charge their own battery (in camera) off USB?

    All the models I'm familiar with don't. Being an electrical engineer and very familiar with the design costs and trade-offs of features in consumer devices much like digital cameras, I can't for the life of me understand why Nikon has chosen to leave this feature out. The added cost to a DSLR to add a charge-off-USB feature is completely irrelevant to a $500+ camera.

    This has always bothered me about my Nikon - but especially today as I'm on a photo shooting vacation and just discovered I left my charger home. I can and do charge other devices off USB in my car and off my laptop. In fact, I'd prefer to charge my camera off USB while traveling and would use that feature a good portion of the time at home as well.

    I have 3 batteries for my Nikon and as of last night, all 3 are spent and now I sit and wait for the new charger I have on next-day order from Amazon. Frustrating.

    And, for all you looking to rib me about forgetting my charger, go for it. You can't beat me up worse than I have already beaten myself up.

    Nikon - put chargers in the camera!


    › See More: Why Not Charge Off USB
    D200
    Nikkor 18-200mm VRII
    Nikkor 10.5mm Fisheye
    http://www.360cities.net/profile/ckmcdonald



  2. #2
    Senior Member
    AC016's Avatar

    Re: Why Not Charge Off USB

    That would be a wonderful idea.
    Who dares, wins.

    Cameras: Fuji X-Pro, Fuji X10, Olympus TG3 and Nikon D2X.




  3. #3
    RIP :(
    Don Kuykendall's Avatar

    Re: Why Not Charge Off USB

    it may have more to do with size and weight added to the camera than with the cost.

    since you have one on next day order you can do what i do. have one at home and have another one WITH your camera in the camera bag. I also have one that plugs into my cigarette lighter in my car and that one stays in the car all the time. cover all bases.
    Thanks/Like Horoscope Fish, Rancher Thanks/liked this post
     

    ================================================== ============================
    D750***D7100***24-120 f/4 ***70-300***Tamron 150-600***Tokina 16-28 f2.8***50mm f/1.8***Photoshop/Lightroom CC

  4. #4
    Senior Member
    Horoscope Fish's Avatar

    Re: Why Not Charge Off USB

    Quote Originally Posted by Tracsoft - Don Kuykendall View Post
    I also have one that plugs into my cigarette lighter in my car...
    I like THAT idea!

  5. #5
    RIP :(
    Don Kuykendall's Avatar

    Re: Why Not Charge Off USB

    Quote Originally Posted by Horoscope Fish View Post
    I like THAT idea!
    All because I did not have a charged battery one time. I am an old dog but I can learn new tricks.


    Sent from my iPhone using Tapatalk 2

    ================================================== ============================
    D750***D7100***24-120 f/4 ***70-300***Tamron 150-600***Tokina 16-28 f2.8***50mm f/1.8***Photoshop/Lightroom CC

  6. #6
    Senior Member
    ckm's Avatar

    Re: Why Not Charge Off USB

    I suppose it's possible that weight and size has something to do with it, but... there are many examples of products on the market that would argue against that. I own several very small PAS cameras that all charge their own battery off USB. Cell phones are another example - not too many products more sensitive to weight/size than a cell phone.

    I really think Nikon is just plain missing the boat on this topic. I can see the reason for external battery charging - that makes sense. But why not design the camera to charge the battery off USB additionally - it appears to be a virtually free feature that many of us would use and appreciate.

    Does anyone know if any of the Nikon DSLR's charge off USB?

    There has got to be a good reason Nikon has not provided this feature - if there is, it's completely escaping me.
    D200
    Nikkor 18-200mm VRII
    Nikkor 10.5mm Fisheye
    http://www.360cities.net/profile/ckmcdonald

  7. #7
    Senior Member

    Re: Why Not Charge Off USB

    USB doesn't put out enough power to charge the DSLR batteries.

  8. #8
    Senior Member
    Roy1961's Avatar

    Re: Why Not Charge Off USB

    don't know if this will help, but I have a phone charger which works with a 9v battery/car/wall outlet, would it charge the camera on the battery?
    Learn to laugh at yourself, everyone else is.
    D500, D7000. SB700.

    Nikkor 18-105mm, 35mm, 70-300mm and Sigma 50-500.

    LowePro 202 Slingshot bag, Wimberley Gimbal head, Benro Carbon Fiber Tripod.

    Vanguard Alta 263 Tripod with SBH-250 ballhead, Vanguard AM 263 Monopod with SBH-100 ballhead.

  9. #9
    Senior Member
    MrF's Avatar

    Re: Why Not Charge Off USB

    I'd imagine that it's size and weight like Don said, and maybe also heat and complexity. USB spec is 5V and 500mA IIRC. The EN EL-15 in my D7000 is rated at 7V. The charger advertises an output of 8.4V at 1.4A. So, they'd have build in a DC to DC converter to get the 5V USB to 8.4V. Since you're stepping up your voltage by a factor of 1.68, you lose by the same factor in current draw, so the 500mA becomes 298mA. So now you're charging the battery at less than one quarter the current that the wall charger can provide, so it'll take over four times as long to reach a full state of charge. Plus, the small, solid-state converters (essentially just voltage regulators) can only be used to step down voltage. If you want to step up DC voltage it becomes more complex. So, added complexity and cost, only to charge the battery four times as slowly.

    I would guess that your point and shoots that charge off of USB operate at less than 5V.

    Just my thoughts; it's been a while since I took EE though.
    Mike

  10. #10
    Senior Member
    Bill4282's Avatar

    Re: Why Not Charge Off USB

    I once had the same problem. Since then I not only keep my charger in my camera bag, I have a charger for every electronic in a ziplock bag in my shaving kit in case I left one at home. I put it in the shaving kit since it goes in checked baggage (no TSA hassles) and always with me when I overnight travel.I also have chargers in both my truck and my car for nook, phone and DVD player for road trips. You can find chargers fairly cheap at the truck stops. I keep my net book with charger in my camera bag. Also have an inverter in my car in case I need to charge my net book on the road.
    Last edited by Bill4282; 05-03-2013 at 10:34 PM.





Quick Reply Quick Reply

If you are already a member, please login above before posting.

Tags for this Thread

Posting Permissions

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
  •