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BLR121

Everything about batteries, history , rebuilding, making replicas, eliminators etc
 
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BLR121

Post by Refugee » Thu Oct 18, 2012 1:13 am

I have opened one of these and found that it contains 10 1.5V button cells.
It was just beginning to corrode the battery holder in one of my AVOs.
The two plastic halves are made to keep the stack of cells lined up with the terminal holes.
I am considering using slightly smaller cells and a plastic tube with the original contact dimples from the ends fitted in the ends of the tube so that i can just put it in and tape the halves back together.

DSCF5697.JPG

 
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Re: BLR121

Post by Michael Watterson » Thu Oct 18, 2012 8:28 am

I'm using 5 x CR2032 in a plastic tube. Fits fine. They cost about 12p each from Hong Kong.

It's round rather than rectangular and a little shorter, but fits the AVO fine.

 
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Re: BLR121

Post by Refugee » Thu Oct 18, 2012 9:54 am

The advantage i have got is that pound shops sell A4 cards with dozens of button cells on them and also the plastic shell is made to fit them.

 
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Re: BLR121

Post by Michael Watterson » Thu Oct 18, 2012 12:23 pm

I forgot about those.

 
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Re: BLR121

Post by Refugee » Thu Oct 18, 2012 12:46 pm

Lovely.
I have been useful :thumbl:

 
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Re: BLR121

Post by Michael Watterson » Thu Oct 18, 2012 1:07 pm

Why have you ever doubted it?

[experiment with different punctuation and intonation :D ]

 
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Re: BLR121

Post by Refugee » Thu Oct 18, 2012 1:12 pm

There have been incidents in other forums but not so here bhbg

 

Re: BLR121

Post by Mike C » Sun Dec 30, 2012 11:57 pm

At least I know what is inside mine now as I have this identical battery. I also have the BLR 122. date wise I would say mid 90s as I have an Ever Ready book with these in but no date on it sadly. Its when Energizer took over some of there products, Berec also made photographic batteries to, The B122 size was used in flash guns and hearing aids to as well as some test equipment.

 
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Re: BLR121

Post by Refugee » Mon Dec 31, 2012 1:34 am

I have been thinking about how to bond the cells into a stick.
A very light smear of conductive paint or epoxy are two options I am looking at.
I know there is a risk of shorting a cell but they are so cheap.

 
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Re: BLR121

Post by rob t » Mon Dec 31, 2012 10:49 am

i still have some blr121's i got them new about 6 years ago .you ar welcome to one for the cost of postage.
rob t

 
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Re: BLR121

Post by Refugee » Mon Dec 31, 2012 11:12 am

I will most likely be using the next size down for the cells and fit a tube around them to keep them in line and rely on the springs in the AVO to maintain contact.
They should go intermittent before any corrosion outside the battery case occurs.
This would provide an early warning of damage in the battery holder.


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