What battery chemistry did Polaroid use 20 years ago in its Polarpulse batteries?

hrho...@sbcglobal.net

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Jun 12, 2015, 3:31:56 AM6/12/15

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I have four 20 year old "POLAROID POLARPULSE" batteries that still read 5.86V when I measure them. They are about 2" x 3" mounted on a heavyweight piece of paper that is 3" x 4". They have been kept at room temperature all the 20 years. It is amazing that after 20 years there is any charge left. I am wondering what chemistry Polaroid used in these batteries?

Rev. 11D Meow!

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Jun 12, 2015, 4:17:01 AM6/12/15

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On Thu, 11 Jun 2015 20:31:53 -0700 (PDT), "hrho...@sbcglobal.net"
<hrho...@sbcglobal.net> wrote:

>I have four 20 year old "POLAROID POLARPULSE" batteries that still read 5.86V when I measure them. They are about 2" x 3" mounted on a heavyweight piece of paper that is 3" x 4". They have been kept at room temperature all the 20 years. It is amazing that after 20 years there is any charge left. I am wondering what chemistry Polaroid used in these batteries?

You might find some useful info on these guys here:
http://users.rcn.com/fcohen/typical.htm

Phil Allison

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Jun 12, 2015, 4:51:51 AM6/12/15

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hrho...@sbcglobal.net wrote:

> I have four 20 year old "POLAROID POLARPULSE" batteries that still read 5.86V when I measure them. They are about 2" x 3" mounted on a heavyweight piece of paper that is 3" x 4". They have been kept at room temperature all the 20 years. It is amazing that after 20 years there is any charge left. I am wondering what chemistry Polaroid used in these batteries?

** The Wiki on the Polaroid SX-70 tell me the battery used was "Zinc Chloride".

Another Wiki informs these are the familiar "Heavy Duty" carbon zinc cells.

... Phil

Jeff Liebermann

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Jun 12, 2015, 5:14:55 AM6/12/15

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On Thu, 11 Jun 2015 20:31:53 -0700 (PDT), "hrho...@sbcglobal.net"
<hrho...@sbcglobal.net> wrote:

>I have four 20 year old "POLAROID POLARPULSE" batteries that still read 5.86V when I measure them. They are about 2" x 3" mounted on a heavyweight piece of paper that is 3" x 4". They have been kept at room temperature all the 20 years. It is amazing that after 20 years there is any charge left. I am wondering what chemistry Polaroid used in these batteries?

What number battery? P80, P100, P300, etc??
Size wise, I would guess(tm) a P100.

Possibly Zinc-Chloride.
<http://users.rcn.com/fcohen/P100.htm>
<http://users.rcn.com/fcohen/Polaroid.htm>
--
Jeff Liebermann je...@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

hrho...@sbcglobal.net

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Jun 14, 2015, 2:55:50 AM6/14/15

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I looked for any other identification on each of the 4 batteries, there were no numbers, and only the words "POLAROID POLAPULSE BATTERY" in full capital letters.

rev.11...@gmail.com

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Jun 14, 2015, 3:00:59 AM6/14/15

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You can compare the dimensions to the different model's dimensions and see which of yours one it is that way.

N_Cook

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Jun 14, 2015, 7:08:16 AM6/14/15

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On 14/06/2015 03:55, hrho...@sbcglobal.net wrote:
> I looked for any other identification on each of the 4 batteries, there were no numbers, and only the words "POLAROID POLAPULSE BATTERY" in full capital letters.
>

Ah but what was the voltage if you put a bit of load on them?

hrho...@sbcglobal.net

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Jun 16, 2015, 3:59:52 AM6/16/15

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I put a 1,000 (1K) ohm resistor across each battery. The voltage stayed at 5.85 volts for 3 of the 4 batteries, the 4th battery went down to 5.2 volts. SO 3 out of 4 supported a 5.8ma load with no change in output voltage. Impressive!!!