TR289 BATTERY

[charliedelta]

Anyone have any data on this Battery? I have a piece test of equipment with this battery that needs replacing.

I have no idea of the current or voltage rating and cant find any data  with a Google search. Its a real mystery battery?

[rdl]

Does it resemble a regular 9 volt battery?

[Gromitt]

Have you googled it?

[rdl]

If it looks like a 9 volt battery, then it's probably a mercury oxide version. They were essentially banned around 25 years ago which is probably why you find little info. It would have been used instead of a normal 9 volt because of the nearly flat discharge curve. I remember having  trouble getting mercury button cells for the light meter in my Nikon F back then.

[charliedelta]

Have you googled it?

But since you asked I have and there is little or no data.

I have googled it 100 times to try and get data and dimensions etc etc

[charliedelta]

It has connectors like the PP3 battery for  positive and negative, but I believe its a 12 volt battery.  I cant find a substitute and it looks like I will be making up my own pack. I just wanted the complete dimensions and other information which appears to be lacking even on google. In this case google was my enemy.

quote author=rdl link=topic=136331.msg1787546#msg1787546 date=1535712032]
If it looks like a 9 volt battery, then it's probably a mercury oxide version. They were essentially banned around 25 years ago which is probably why you find little info. It would have been used instead of a normal 9 volt because of the nearly flat discharge curve. I remember having  trouble getting mercury button cells for the light meter in my Nikon F back then.
[/quote]

[Gromitt]

https://books.google.se/books?id=QmVR7qiB5AUC&pg=SA55-PA10&lpg=SA55-PA10&dq=TR289+BATTERY&source=bl&ots=clFeMPVgcC&sig=IzZEYlAOI4sEvrIUSc4IrZ_lOOo&hl=sv&sa=X&ved=2ahUKEwj6ks32kpjdAhXJblAKHUESAPgQ6AEwA3oECAgQAQ#v=onepage&q=TR289%20BATTERY&f=false

[rdl]

It has connectors like the PP3 battery for  positive and negative, but I believe its a 12 volt battery.  I cant find a substitute and it looks like I will be making up my own pack. I just wanted the complete dimensions and other information which appears to be lacking even on google. In this case google was my enemy.

Okay. Then as I suspected, this is probably your battery.

DURACELL
Description: Nonrechargeable Battery
Mfr. Cage# 90303

Specifications

Terminal Quantity: 2
Terminal Type: Snap-on
Overall Length: From 1.688" and 1.750"
Overall Width: From 0.969" and 1.031"
Overall Thickness: From 0.594" and 0.656"
Voltage: 8.4 Volts
Type: Mercuric oxide type
Shape: Rectangular w/rounded corners

Seems to be just a special type of 9 volt battery. Current rating would be similar to six Mercury button cells. The most important thing when replacing it may be the discharge curve, since it is very likely that was the reason a mercury oxide type was used in the first place. Silver-oxide batteries can be used as a replacement for Mercury oxide types when a flat discharge curve is needed, but the voltage is higher so adjustments will be needed or possibly an additional voltage regulator.

[bw2341]

https://books.google.ca/books?id=QmVR7qiB5AUC&pg=SA55-PA10&lpg=SA55-PA10&focus=viewport&dq=duracell+%E2%80%9Ctr289%E2%80%9D

https://edcorusa.com/boards/topic/150/question-about-edcors-old-wireless-systems

The Google Books link has the dimensions, while the Edcor link has a description.

It’s a 12.6V mercury oxide battery of 25.4mm diameter 61.1mm length. It has battery snap connectors on each end.

Edit: It looks like the Google Books link is broken. I found it by Googling “Duracell TR289”. The book title is “Battery Reference Book” by Thomas P J Crompton.

[Gromitt]

Edit: It looks like the Google Books link is broken.

Thats because you don't use the URL tags when you post a link.

[bw2341]

Thanks! It's fixed.