I have four 20 year old "POLAROID POLARPULSE" batteries that still read 5.8
6V when I measure them. They are about 2" x 3" mounted on a heavyweight pi ece 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?- posted
8 years ago