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Renata No 31 Battery [message #4347]

Sun, 19 October 2014 04:01

Gary
Messages: 2114
Registered: May 2013
Location: Left Coast

Gruen Authority
Cheerleader

I broke open a modern Gruen quartz watch given to me in a lot of old watches. This baby is Swiss made for sure, will post it in the model identification when I get the chance. Looking for a new battery but cannot find an equivalent.

Renata No 31

index.php?t=getfile&id=1762&private=0

Attachment: battery.jpg
(Size: 40.30KB, Downloaded 2487 times)

[Updated on: Sun, 19 October 2014 04:04]

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Re: Renata No 31 Battery [message #4348 is a reply to message #4347]

Sun, 19 October 2014 13:19

Bazzab
Messages: 181
Registered: May 2013
Location: Tampa Bay Fl

Gruen Guildsman

Try this Battery Cross Reference Guide
Might Help

http://www.battery-house.co.uk/reference.html

B

http://www.watchesoftheguild.com/

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Re: Renata No 31 Battery [message #4349 is a reply to message #4348]

Sun, 19 October 2014 15:01

Gary
Messages: 2114
Registered: May 2013
Location: Left Coast

Gruen Authority
Cheerleader

Thanks B! Yeah this must be a very old quartz. The renata list starts in the 300's, mine is in the 30's Sad

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Re: Renata No 31 Battery [message #4350 is a reply to message #4349]

Sun, 19 October 2014 15:33

Bazzab
Messages: 181
Registered: May 2013
Location: Tampa Bay Fl

Gruen Guildsman

If you search for yours in the box, it gives a list of replacement for equivalent batteries.
They also have yours in stock!

http://www.watchesoftheguild.com/

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Re: Renata No 31 Battery [message #4351 is a reply to message #4350]

Sun, 19 October 2014 17:28

Barney Green
Messages: 1747
Registered: February 2014
Location: Wolfsburg, Germany

Gruen Authority

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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Re: Renata No 31 Battery [message #4352 is a reply to message #4351]

Sun, 19 October 2014 18:26

Gary
Messages: 2114
Registered: May 2013
Location: Left Coast

Gruen Authority
Cheerleader

Thanks Bernd! Yes by my old vernier callipers the measurements are 1.5 thickness x 6.7 mm in diameter.

I have the 312's on hand and they come nowhere close.

index.php?t=getfile&id=1763&private=0

Attachment: 31_312_compare.jpg
(Size: 127.64KB, Downloaded 2220 times)
Attachment: 312_31_compare1.jpg
(Size: 56.24KB, Downloaded 2276 times)

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Re: Renata No 31 Battery [message #4353 is a reply to message #4352]

Sun, 19 October 2014 18:48

Barney Green
Messages: 1747
Registered: February 2014
Location: Wolfsburg, Germany

Gruen Authority

OK, in this case I'd go with a SR616 which is also sold as 321. It measures 6.8mm diameter and 1.65mm height. This is the smallest common battery that should fit.
There is one smaller battery with 1.4mm height which is the SR614 also known as 339. That one is hard to get.

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

[Updated on: Mon, 20 October 2014 06:01]

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Re: Renata No 31 Battery [message #4354 is a reply to message #4353]

Sun, 19 October 2014 18:58

Bazzab
Messages: 181
Registered: May 2013
Location: Tampa Bay Fl

Gruen Guildsman

Not sure if this one is any better!

http://www.batterymart.com/p-364-silver-oxide-button-cell-ba ttery.html

B

http://www.watchesoftheguild.com/

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Re: Renata No 31 Battery [message #4355 is a reply to message #4354]

Sun, 19 October 2014 19:02

Barney Green
Messages: 1747
Registered: February 2014
Location: Wolfsburg, Germany

Gruen Authority

No, it's too high, 2.15mm....

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

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Re: Renata No 31 Battery [message #4356 is a reply to message #4355]

Sun, 19 October 2014 21:36

Gary
Messages: 2114
Registered: May 2013
Location: Left Coast

Gruen Authority
Cheerleader

Found a 321 at RadioShack and fits perfectly!

index.php?t=getfile&id=1765&private=0

Attachment: 321_battery.jpg
(Size: 72.85KB, Downloaded 2226 times)

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Re: Renata No 31 Battery [message #4357 is a reply to message #4356]

Mon, 20 October 2014 06:00

Barney Green
Messages: 1747
Registered: February 2014
Location: Wolfsburg, Germany

Gruen Authority

What I said. Happy that I could help...

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

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