[Tractorfan]

Hi,
On the subject of long lived cells, I unearthed this novelty 'Smarties' gadget that makes various noises when the buttons are pressed. It originally had a plastic strip to isolate the cell which was pulled out (and lost).
It must be pushing fifteen years old and it still works. It probably used something like an LR44 button cell, or two. It cannot be opened and was expected to be thrown away once the cell was flat.
I didn't realise these cells could have such a long idle life without leaking or going flat despite the very tiny quiescent current.
Cheers, Pete.