Those little 675 hearing aid batteries are awesome

mudman · Dec 10, 2009

I just received a Nikon F off of craigslist, with the Ftn meter. Unfortunately, the Ftn meter takes the old mercury cells, which are outlawed in the states. I found a good substitute, that seems to be cheaper than the wein air cells that people sometimes use: 675 zinc air batteries, 2 orings and aluminum foil. The o rings make it so the batteries don't rattle around in the battery chamber, and the aluminum foil completes the connection. Total spent (besides the batteries): $0.80. Much cheaper than the criscam adapters or even the little metal rings someone is selling.

Cheers,

Eric

elekm · Dec 10, 2009

The 675 hearing-aid batteries are one of the best ideas and values for older cameras.

Once in a while, you'll get a camera that requires the physical shape of the old PX13/625 battery.

But for most, you'll find that a 675 + "O" ring works fine. I've used metallic washers from the hardware store.

mudman · Dec 10, 2009

Hey Mike

Which washer did you use? I couldn't find one that was the right dimensions, which is why I went with the rubber o-ring.

Stock Dektol · Dec 10, 2009

Whoa, never even thought of that.

Good idea.

LaGrassa · Dec 10, 2009

I recently did this with my Minolta Hi-Matic 7S Rangefinder and it worked great. Very economical solution.

MattKing · Dec 10, 2009

John Goodman (interslice on eBay) sells an inexpensive custom adapter that you insert the 675 battery into. The resulting package duplicates the shape and connectivity of the old mercury 625 batteries.

No connection, satisfied customer, etc.

Matt

mudman · Dec 10, 2009

This is another one that I had seen http://www.paulbg.com/Nikon_F_meter_batteries.htm

The oring and aluminum foil seems to be doing the trick though, for a lot less than $15 a piece.

Thagoson · Dec 10, 2009

Instead of O-ring or washer, you could also use the solid copper wire of about 2 mm and wrap it around a pen that just a little smaller than the cell and cut it into a ring. It will expend and fit on the cell nicely.

Excalibur2 · Dec 11, 2009

***Those little 675 hearing aid batteries are awesome***

Indeed, they work very well in my hearing aid.....in the UK I get mine free.

Steve Smith · Dec 11, 2009

Excalibur2 said:
Indeed, they work very well in my hearing aid.....in the UK I get mine free.

Even if you have to pay for them, a pack of six are almost free anyway at £1.60 from Boots.

Steve.

brian d · Dec 11, 2009

Indeed, they work very well in my hearing aid

me too, I'm basicaly deaf with out them

in the UK I get mine free.

not so lucky in the states

I have used them in a old Honeywell 3/21 spotmeter

budrichard · Dec 11, 2009

It's referred to as a #9 rubber o-ring in the trade.-Dick

JCJackson · Dec 11, 2009

You can also make your own conductive ring out of 12 gauge copper wire. With needle nose pliers and a bit of patience you form an ring with a small gap. It should have just enough spring to it to fit the battery. I am using this with 675 battery in a Nikkormat ftn, and it works just fine.

Pumal · Dec 12, 2009

You can have a metal 'O' ring by cutting it off a spring.

Steve Smith · Dec 13, 2009

in the UK I get mine free.

brian d said:
not so lucky in the states

Are you not heading in that direction though? (National Health Service).

Steve.

brian d · Dec 13, 2009

Are you not heading in that direction though? (National Health Service).

I guess it is very possible but I fear what it might be like under gov. control

Pumal · Dec 14, 2009

I hope you find the money for all that. They tell me The Fed. is furiously printing Dollars in the Basament

Those little 675 hearing aid batteries are awesome

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