Net Zero

Secrecy in the Battery Industry Is Becoming a Headache for Everyone

Without third-party validation of battery performance, expect short sellers to question the viability of startups with unproven technology

Photographer: Krisztian Bocsi/Bloomberg
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Most automakers have now committed to electrifying their fleets. That’s brought growing attention to batteries, which still make up about a third of the cost of an electric car, and led to multibillion-dollar valuations of secretive startups.