TR289 BATTERY - Page 1
Forum section: electronics / general

author: charliedelta
author_rank: Regular Contributor
timestamp: August 31, 2018, 08:31:20 am
content: 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?

author: rdl
author_rank: Super Contributor
timestamp: August 31, 2018, 10:17:54 am
content: Does it resemble a regular 9 volt battery?

author: Gromitt
author_rank: Regular Contributor
timestamp: August 31, 2018, 10:31:51 am
content: Have you googled it?

author: rdl
author_rank: Super Contributor
timestamp: August 31, 2018, 10:40:32 am
content: 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.

author: charliedelta
author_rank: Regular Contributor
timestamp: August 31, 2018, 08:09:22 pm
content: 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

author: charliedelta
author_rank: Regular Contributor
timestamp: August 31, 2018, 08:12:48 pm
content: 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.

author: Gromitt
author_rank: Regular Contributor
timestamp: August 31, 2018, 08:41:16 pm
content: 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

author: rdl
author_rank: Super Contributor
timestamp: September 01, 2018, 02:44:00 am
content: Quote from: charliedelta on August 31, 2018, 08:12:48 pmOkay. Then as I suspected, this is probably your battery.QuoteSeems 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.

author: bw2341
author_rank: Regular Contributor
timestamp: September 01, 2018, 03:06:26 pm
content: https://books.google.ca/books?id=QmVR7qiB5AUC&pg=SA55-PA10&lpg=SA55-PA10&focus=viewport&dq=duracell+%E2%80%9Ctr289%E2%80%9Dhttps://edcorusa.com/boards/topic/150/question-about-edcors-old-wireless-systemsThe 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.

author: Gromitt
author_rank: Regular Contributor
timestamp: September 01, 2018, 11:32:04 pm
content: Quote from: bw2341 on September 01, 2018, 03:06:26 pmThats because you don't use the URL tags when you post a link.

author: bw2341
author_rank: Regular Contributor
timestamp: September 02, 2018, 12:19:53 am
content: Thanks! It's fixed.