Tesla's “battery day” Could Be Bad News For Cobalt Miners

Elon Musk’s Tesla hosts its annual shareholder meeting on Tuesday, Sept. 22, followed by the highly anticipated “battery technology day”, a worldwide live-streamed event during which the firm is expected to unveil its own new type of battery cell. Speculation points to a cobalt-free battery that uses more of less costly metals such as nickel and manganese.   Tesla currently uses the nickel-cobalt-aluminum cathode chemistry, which has a low cobalt content of about 5%, for their…