> They're in production today, and will probably be forever.

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

> But for high power density, low cost, and and high current applications where you don't have to worry about carrying them or tipping them over, you're going to be stuck with lead in a bucket of acid for a while I suspect.

You'd think, but they _haven't_ seen a lot of use in, say, grid-scale applications.