> I suspect their days are numbered, because they have become _far_ more expensive to dispose of, and that's only going one direction. They're insanely easy to

> I suspect their days are numbered, because they have become _far_ more expensive to dispose of, and that's only going one direction. They're insanely easy to recycle. You melt lead, you recast it into new plates. Sulphuric acid is very easy to make, and we need to make a lot of it as part of the process of making fertilisers. > You'd think, but they _haven't_ seen a lot of use in, say, grid-scale applications. Every telephone exchange you have ever dialled through is powered by massive lead-acid battery, with cells about the size of a decent microwave oven.