For Tesla the cases are steel, but that's a tiny cost. The cost drivers are nickel, cobalt, and graphite in that order. Nickel stabilized lately but is still subject to fluctuations in demand- entirely at the whim of stainless steel, the main consumer. Cobalt is anyone's guess, but is usually fairly stable and batteries still aren't the largest consumer (IIRC, but it's very close). Graphite is pretty stable because >40% is synthetic. It's a somewhat nasty process that requires a lot of acids and tons of energy, but it's nothing special.
Nickel is a worry. Cobalt is unlikely to be a concern for tariffs since it would probably help China to tax it. Graphite might be under threat too since it's made in both the US and China.
Other materials like lithium or organics are unlikely to be taxed or are manufactured at large scale.
Nickel is a worry. Cobalt is unlikely to be a concern for tariffs since it would probably help China to tax it. Graphite might be under threat too since it's made in both the US and China.
Other materials like lithium or organics are unlikely to be taxed or are manufactured at large scale.