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Replacement Battery for Minox BL


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Does anyone know if there are substitutabke batteries for the 1.35

volt PX -675 for the Monox BL? I have not had any luck with the local

camera stores and battery supply stores. Can you substitute the 1.5

volt 675 that is available for hearing aids? Thanks very much, Robert

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Bob, no, it is risky to use 1.5 v battery in BL. Use it at your own risk

<p> You can buy Wein cell 1.35 v replacement cell for PX675 for $4.49 a piece

from freestyle at http://www.freestylesalesco.com catalog number #990-122

<p> Tel 800-292-6137.

<p> Or you may contact CRIS they sell adapter to convert silver oxide 1.5v cell into

1.35v. Tel 800 216 7679. Fax 602 940 1329

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After lots of phone calls, I was able to locate some WEIN 1.35 675

batteries for the Minox BL. I noticed it was very difficult to remove

the Wein battery as the fit into the battery compartment was very

tight. After examining the Owner's manual, I noticed reference to a

cloth strap with a red dot, which is used as a pull strap to remove

the battery. Unfortunately the Minox BL I have is missing this cloth

strap, I was able to cut a thin strip of electrical tape and wrap it

around the edge of the battery, so I am now able to remove it if

needed. Thought this might be of interest if anyone has a the same

problem with their BL battery compartment. Thanks to all who responded

with help.

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I have been using S-76 silver oxide button cells in my BLs for some

time now, with no noticeable difference over mercury originals. The

problem with a Wein cell or any other zinc-air cell, is that they go

dead very quickly once activated, and if this happens with film in

the camera, you cannot change the battery without opening film

chamber. The battery that Minox Labs is selling as a BL replacement

is an A-76, which is the alkaline version of an S-76. Problem with

Alkalines, though, is inconsistancy. They have a sloping discharge

curve, silver oxides have a flat discharge curve, like mercury cells

did. The only difference is a 1.5v rating versus 1.4v for the

original mercury 675 battery. External dimensions are the same. As

the Alkaline voltage starts out higher than the silver oxide on new

cells then drops steadily lower, I reason that the silvers should be

safer. Main difference is that the alkaline voltage does not remain

consistent, silvers do. The silvers will put out the same voltage

right to the end, then drop dead. I tested these against fresh

mercuries in 4 different BLs several years ago, when mercuries were

still available. I could not see any practical metering differences.

Also compared against several zinc-air 675 substitutes, incuding

regular and heavy duty 675 zinc-air hearing aid batteries (which are

probably the same as, or similar to Wein cells). I cannot detect any

individual changes when using the silvers compared to these. Of

course, some of these old meters may be off in accuracy anyway. I

have a BL that needs to be set at 50 ASA to get correct exposure

readings on 100 ASA film speed, but it did this with mercuries too.

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