Batteries vary a lot. Lithium iron phosphate seems pretty reasonable to me: they're made of lithium, iron, copper, aluminum, plastic, fertilizer, carbon, and p

Batteries vary a lot. Lithium iron phosphate seems pretty reasonable to me: they're made of lithium, iron, copper, aluminum, plastic, fertilizer, carbon, and probably a few more things I'm not aware of. Nothing particularly toxic or hard to recycle, and they tend to have very good longevity. https://en.wikipedia.org/wiki/Lithium_iron_phosphate_battery https://en.wikipedia.org/wiki/Lithium_iron_phosphate_battery