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  1. #1

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    Replacement for PX625 Batteries.

    I have two Nikkormats and they as well as other Nikons of the era used the now-banned Mercury PX625 1.3v batteries to power their meters.
    I have inadvertently double ordered two conversion kits (already had two but my wife "filed" them) made in Holland that use a machined-out shell of the original battery size, fitted with a diode and into which the standard SR44 (silver oxide) or LR44 (lithium) cells fit. The whole assembly is then inserted in the battery chamber as if it were an original cell. The diode reduces the 1.5v of the newer batteries to a steady 1.3v as per the original specs. I only use the silver oxide type. They're much better than using the Wein zinc oxide type.
    I can return the surplus ones for a refund, but before I do I thought I'd check to see if there was any interest locally - (Australia). Paid 16 Euros each for them.
    Leica M6,
    Bessa R4A,
    Rolleiflex(s) 2.8/80, 4/135, 4/55.
    Nikkormat FTn
    Fuji X10

  2. #2

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    I have one (purchased a few years ago); they do work well.
    "Far more critical than what we know or do not know is what we do not want to know." - Eric Hoffer

  3. #3
    munz6869's Avatar
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    Hi Leigh - I'd be interested, to feed my Rollei 35, amongst others....

    Marc!
    Marc Morel
    photographie argentique!
    ------------
    http://mrmarcmorel.wordpress.com/

  4. #4

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    I use the hearing aid batteries (Type 675) for most of these uses. The downside is their short lifespan (about six months), and the benefit is that they're available almost anywhere and very inexpensive. They deliver 1.4 volts and seem to be just about perfect.

    However, some cameras requuire the physical shape of the 625/PX13 cell, while others need a small adjustment in the battery chamber.

    For the Rollei 35, I use a small rubber "O" ring. No. 9, I believe. And then I bend up slightly the small flat metal contact in the battery chamber.

    Doesn't work for the SE and TE models, as they take different batteries (PX28).

    For many of my older cameras, I've simply given up on the in-camera meter and simply use a handheld meter.

  5. #5
    Pumalite's Avatar
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    You can rewire your Nikkormats for modern batteries. I did mine.
    " A loving and caring heart is the beginning of all knowledge " ~ Thomas Carlyle ~

  6. #6

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    Wein sells a replacement, but it's a zinc-air like the hearing aid battery.

    Alternatively, at camera shops you can get an alkaline equivalent. My Minolta SRT-200 uses the same battery and the alkaline replacement works great, and was only about $3US. It was under the brand Promaster.

  7. #7

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    Quote Originally Posted by munz6869 View Post
    Hi Leigh - I'd be interested, to feed my Rollei 35, amongst others....

    Marc!
    Send me a PM so we can do it offline. Or email <lmyoudale@me.com>
    I found where my wife had filed my stuff (in error, its not like she's a bad person!) so I'm actually going to end up with five of the things to go with only two cameras and I've had two enquiries this morning, including yours, so I can probably satisfy everyone at the moment.
    They come with full specs, a five-year guarantee (made out to me at the moment) and a new battery to go in the unit.
    I'll be out of circulation tomorrow but can post them anywhere in Oz from Tuesday on.
    When they're gone I'll give the contact details as people overseas might also be interested.

    Leigh
    Leica M6,
    Bessa R4A,
    Rolleiflex(s) 2.8/80, 4/135, 4/55.
    Nikkormat FTn
    Fuji X10

  8. #8
    Mainecoonmaniac's Avatar
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    I'm not sure if this website is applicable to your case, but I a have an old Minolta SRT that uses mercuruy batteries. I did some research and there a gentleman in the internet that shows how you can convert your Minolta SRT to use available silver oxide batteries.

    http://www.rokkorfiles.com/conversion.htm

  9. #9
    MattKing's Avatar
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    Quote Originally Posted by brofkand View Post
    Wein sells a replacement, but it's a zinc-air like the hearing aid battery.

    Alternatively, at camera shops you can get an alkaline equivalent. My Minolta SRT-200 uses the same battery and the alkaline replacement works great, and was only about $3US. It was under the brand Promaster.
    The alkaline "equivalents":

    a) supply a different voltage than the original mercury batteries; and
    2) more importantly, supply a voltage that changes over time.

    For those reasons, unless the camera or meter has circuitry that deals with changing voltage, the alkaline "equivalents" do not provide a good replacement.

    Jon Goodman (formerly interslice on eBay - famous for camera seals) has in the past sold adapters that allow use of the 675 hearing aid batteries in cameras and meters that require a battery of the exact same shape as the 625 mercury cells. I'm not connected with Jon in any way, but I am a happy customer.
    Matt

    “Photography is a complex and fluid medium, and its many factors are not applied in simple sequence. Rather, the process may be likened to the art of the juggler in keeping many balls in the air at one time!”

    Ansel Adams, from the introduction to The Negative - The New Ansel Adams Photography Series / Book 2

  10. #10
    Oxleyroad's Avatar
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    Leigh, if you have a spare after Supplying Marc one I'd be interested for my old Sekonic light meter.
    Cheers - Andy C
    ---------------------

    16mm Cine, 35mm, 120, 5x4 & 7x5.

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