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Re: Renata No 31 Battery [message #4351 is a reply to message #4350] Sun, 19 October 2014 17:28 Go to previous messageGo to previous message
Barney Green is currently offline  Barney Green
Messages: 742
Registered: February 2014
Location: Wolfsburg, Germany
Gruen Master
I tried it and they came up with the 312 which is for most likely the right one as it is a hearing aid battery. These are Zinc air cells which have a different characteristic than the normally used silver oxide baterries for watches. I guess this old model was a mercury cell and as such is nowadays banned.
Gary, most helpful woulfd be measurung diameter and height of the battery at a tenth of millimeter. Then I should be able to find the correct modern equivalent...


Gruen, Gruen, Gruen ist alles was ich habe... Gruen, Gruen, Gruen is all I have...(German folklore song)
 
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