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?

On Thu, 11 Jun 2015 20:31:53 -0700 (PDT), "
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 he
http://users.rcn.com/fcohen/typical.htm

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

On Thu, 11 Jun 2015 20:31:53 -0700 (PDT), "
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
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

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.

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

On 14/06/2015 03:55, 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?

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!!!