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Thread: Shutter trigger - suggestions for batteries

  1. #1

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    Shutter trigger - suggestions for batteries

    I am building a wired trigger for shutters. My working prototype is powered by 4 AA Eneloop batteries. I get around 500 actuations per charge, which is quite good, I think. The only issue is that the case then becomes quite bulky. My friend, who is designing the electronics, suggests using a 3.7V lithium battery like this: http://www.batterybob.com/products/1...ery-pda-279li/ He tested this battery, and the results were quite good.

    But these batteries require charging within the device, which leads to all sorts of regulatory issues. I'd prefer to use a standard camera or video camera battery like this Watson battery. But I've not been able to locate a holder for these batteries.
    Can I use this adapter plate to hold the batteries within the device?

    Any other suggestions?

    Thanks,
    Kumar

  2. #2

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    Re: Shutter trigger - suggestions for batteries

    I don't know what your power requirement is but if I were doing this I'd try to base it on a small LED flashlight like a small Surefire with 2 CR123a batteries and a momentary switch, and run my wire right out of the front of that to the shutter. Grip, switch, battery compartment, all in one small package.

  3. #3

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    Re: Shutter trigger - suggestions for batteries

    The current drawn is ~1A. Can these batteries deliver that?

  4. #4

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    Re: Shutter trigger - suggestions for batteries

    No idea.

  5. #5

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    Re: Shutter trigger - suggestions for batteries


  6. #6

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    Re: Shutter trigger - suggestions for batteries

    Thank you.

  7. #7

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    Re: Shutter trigger - suggestions for batteries

    As it happens, I'm doing a lot of work with AA cells at the moment; they definitely don't do what the label says they do!

    I would recommend *not* using rechargeable in-device cells; your electronic friend will know that the charging is problematical. You might though consider using a Lithium Manganese Dioxide AA cell, which will give you the six volts you need in only two AA-sized cells, so half the size of your current pack. http://uk.farnell.com/varta/61171013...-aa/dp/8636192

    Neil

  8. #8

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    Re: Shutter trigger - suggestions for batteries

    Hi Neil,

    That is very helpful. I don't want to use in-device rechargeable cells, which is what my electronics friend suggested. Coping with the regulatory issues surrounding them would be impossible for me. I also want to use batteries that photographers would already have - like AA Eneloops and 3.7V / 7.2V / 7.4V Lithium. Then there's no need for them to buy special chargers, etc.

    Have you used these batteries much?

    Thanks,
    Kumar

    Edit: I can't find these batteries in any of the major stores in Japan. Panasonic too does not list them in their catalog.

  9. #9

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    Re: Shutter trigger - suggestions for batteries

    You know, if you use one of the battery types that photographers "already have"... they'd also have the charger.

  10. #10

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    Re: Shutter trigger - suggestions for batteries

    I use 30 AA Eneloops in rotation in 4 SB 800. Several LED Torch. All normal remotes get AAA Eneloops. Only PCB Cyper Commander cannot use them. I stock a big pile of Duracell in all sizes. Of course for any digital camera we need at least 2 special batteries and AC adapter.

    Next I want PCB Vagabond...

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