Archived posting to the Leica Users Group, 1997/10/28

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Subject: Re: px 625
Date: Wed, 29 Oct 1997 00:45:49 +0200

I live in Athens, Greece, and last week I bought 3 batteries at
the corner photo finishing shop. There was no brand name on the
packaging (at least not in non-Chinese characters), but the
packaging says "Long Life Watch Cell HD1560/1.35V" and
"MR9/EPX625/V625PX/RPX625", and the batteries themselves say
"VINNIC HD1560 Mercury Cell".

Interestingly, the voltages of the three batteries are:


I have never heard of a mercury battery being over its standard
voltage (remember that in the old days, mercury batteries were
used as a laboratory voltage reference standard).  

I also measured the voltage of a slightly used Wien Air Cell
I had lying around, and it was 1.429 volts, which is not really
that close to 1.35...

Doug Braun