Depends on on what they're trying to convince people of. I see a few options:
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They believe they are close to a breakthrough and just need a little bit more funding to get all the way there. I don't see this as likely because then they wouldn't have come out with such extraordinary claims straight out of the gate.
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They want to fool potential customers into buying their products. Also not likely for the same reason you said, no one is going to include a product into their production line without verifying things first.
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They want to fool investors into buying the company. This is what I think is going on, they want enough breadcrumbs so that people who want to come out ahead of the big players (CATL, QuantumScape, Solid Power) will let their fear of missing out outweigh their skepticism and go all-in, then just cash out before anyone realizes it was a bluff.
While some people identify possibly problematic themes with this, for me it was quite moving. My family in particular have always seen this version of me that I never saw, especially not when I was suffering from depression and only seeing myself as someone who didn't deserve happiness, and once I started therapy it made it easier for me to start appreciating myself more. They saw the person it would take me a very long time to give myself permission to discover.
This reminds me of that.