[adrian_b]

I do not know if any such tanks are in production, but there where experimental electric tanks, just not with batteries, but with turbogenerators.

[kelseyfrog]

Great question! Turns out there are. The U.S. Military's Abrams Tank Is Going Hybrid [1]. I'm sure we'll get some comments saying why it's a terrible idea[2].

1. https://insideevs.com/news/784805/abrams-m1e3-hybrid-tank-vi...

2. https://news.ycombinator.com/item?id=47484044