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Mercury battery replacements


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Does anyone have concrete experience using the MR-9 adapter in a CL

or M5? Is the meter as accurate as with the original mercury

cells? The Wein cell seems like a poor choice for cameras which are

used occasionally -- once you expose them to air, they start running

down regardless of whether they are being used or not. And it seems

like the voltage is not an exact match for the mercury cells. Any

practical experience, guys?

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My local repair guy adjusted something on my CL and glued a little piece of gel filter over the cell. I now use 625 alkaline batteries and the camera seems to agree OK with my Weston Master and Gossen meters as well as my Bessa L. My exposures seem fine. The batteries last a long time and are easy to find.
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You can buy an adapter that changes the voltage. You can then use (LR44) batteries, (I think). Anyway, it exists, and it is very cheap way to solve the problem. I picked one up in Tokyo for less than $30 new. The batteries that slip in the adapter which looks like a hollowed out Mercury cell, are less than a dollar a piece here in Japan. I wuold give you more info, but the adapter is in my leicaflex that I shipped to Britain for a repair estimate.

 

It definitely exists, and corrects the meter to run like it would with Mercury cell.

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Claude, I believe you & Cameron are referring to the C.R.I.S. adapter (http://www.criscam.com/mr9.htm). I recently bought 1 for my Contarex Super & it seems to work fine in comparison w/my few remaining PX 625 mercury cells. I have no experience using the MR-9 w/any Leica cameras, however. BTW, the De Gruijter information mentioned by Andy is very informative.
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The wein cells life can be greatly extended if you recover the air holes when not in use.

 

The CRISS adapter and the silver cell are thicker than the mercury cell and the cover did not screw down completely on my M5.

 

With my SL, the exposures were accurate for for light, but not in sun. Some diode in the adapter does not pass enough current for bright light reading in some cameras. The adapter works fine in my Rollei 35. The M5 was sold before I realised there was a problem in high light, so I can`t tell you that model.

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I tried the - rather expensive - CRIS adapter on CL and MR, and my immediate impression was that they seemed to work OK, but I had no chance of thoroughly testing the combinations in different light situations.

 

When asking for advice from Leica in Solms on the matter, I got the answer that Leica recommends the use of the WeinCell MRB625 1.35 V mercury-free battery to replace the PX 625 and PX 13 batteries, and, furthermore, Leica does NOT recommend the use of the CRIS adapter.

 

Following Leica's advice, I have installed Weincell MRB625 batteries in my CL and my SL2MOT as well as in my Leicameter MR. They do work perfectly and will probably do so for a year or more, so I see no idea whatsoever in changing back to the CRIS adapter, the function of which seems uncertain in the light of the above answers.

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The CRIS adapter with battery is about .005" thicker than the PX625 mercury battery it

replaces so I've heard that it is a tight fit in some CL cameras. It worked fine in mine, I

used it for about a year. Metering was spot on and the same silver oxide battery lasted the

entire time.

 

Godfrey

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Do not use the LR44 battery with the C.R.I.S. MR-9 adapter. The correct battery to use is a 386. The LR44 battery is thicker than a 386 and will cause problems with fit in some cameras. I usually find the 386 batteries in drug stores (Rite Aid here locally).

 

I used the C.R.I.S. adapter in my CL for a couple of years until I had it CLA'd by DAG and he recalibrated the meter to take the current PX625 1.5 volt battery. I have seen no difference in metering using the C.R.I.S. adapter and 386 compared to using it now with a 1.5v 625 since being recalibrated.

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When a camera is in for a CLA, most service shops will recalibrate the meter circuitry for a 1.5 volt silver cell at no additional charge.

 

The LR 44 cell is smaller in diameter and slightly thinner than the mercury cells so you'll need an o-ring to keep it centered in the battery chamber and possibly a metal disc or thin washer to make up for the missing thickness. No big problem really, I'm doing this in a Leicaflex SL than Sherry Krauter recalibrated for me.

 

There is a silver battery, the S625PX, These are available through some of the specialist battery sellers on the web.

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Now, I am thoroughly confused!

 

I never did have much of a chance to use the SL with the adapter, before sending it off. So I am not really offering that much of an informed opinion to anyone; it seemed to work.

 

I need to take a good look at it when I get it back. The other problem, with the SL, is that the little metal contact tab in the battery well is susceptible to becoming brittle and breaking. One more damn problem to deal with!

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  • 9 months later...

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