Old battery

[Mike Watterson]

The CR2032 are best used up to 1mA max. However as the discharge is very flat, it may be that only 6 needed in each stack. They need fuses and 1N4148 diodes to parallel the stacks. They can explode or go on fire if a stack is shorted. About 12c to 20c each from China, same quality as Tesco sells at €2.50 each. Zinc Layer PP3 may do if 12V to 18V works. Or 27V maybe fine. Some Alkaline PP3 are oval stacked coins and some are similar to AAAA. One of the AAAA based ones can be opened and 3 cells (half pack) added to the pair of 9V.

I'd be interested in the dimensions etc to add the pack here: http://www.blaukatz.com/tables/layer-ht-...batteries/
I do have a lot of catalogues, I've just not got round to filling in the tables!

I only collect the card outers.