Batteries do not use rare-earth elements (as far as I am aware). You may be thinking of cobalt, which is expensive and mostly mined in the Congo. Reducing the

Batteries do not use rare-earth elements (as far as I am aware). You may be thinking of cobalt, which is expensive and mostly mined in the Congo. Reducing the cobalt content of cathodes is a big priority for the industry: https://cleantechnica.com/2018/06/09/cobalt-free-car-batteries-in-the-works-for-panasonic-tesla/ https://cleantechnica.com/2018/06/09/cobalt-free-car-batteri...