[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"branding":3,"analytics":7,"article-donut-labs-solid-state-battery-claim-disproved-by-independent-testing":10,"sections":35},{"siteName":4,"siteTagline":5,"publisherName":4,"contactEmail":6},"The Revision","Tech news, decoded.","editor@therevision.news",{"gaMeasurementId":8,"adsenseClientId":9},"G-ZW2MV82GYR","ca-pub-8533917693782264",{"article":11},{"id":12,"slug":13,"title":14,"dek":15,"body_md":16,"tags_json":17,"published_at":18,"created_at":19,"updated_at":20,"status":21,"review_note":22,"review_notes":23,"image_url":24,"persona_id":22,"persona_name":22,"section":25,"tags":26,"sources":30,"feedback":34,"feedback_at":22,"cost_usd":34,"total_tokens":34},459,"donut-labs-solid-state-battery-claim-disproved-by-independent-testing","Donut Lab's Solid-State Battery Claim Falls Apart","Third-party tests say Donut Lab's battery uses conventional lithium-ion chemistry, not the solid-state tech its $1.25B valuation is built on.","A Finnish startup's claim to have developed a production-ready solid-state battery has collapsed under independent testing.\n\nDonut Lab raised $25 million and reached a $1.25 billion valuation on the basis of those claims. Third-party tests found its cells use standard lithium-ion chemistry — not the solid-state chemistry the company had advertised. The startup is valued at roughly 50 times what it raised, a multiple that now rests on contested ground.\n\nInvestors have funded solid-state battery startups on the premise that someone will eventually crack the chemistry that incumbent lithium-ion can't match. The argument for those valuations requires the claimed technology to actually exist. A gap between advertised chemistry and tested chemistry isn't a delayed timeline — it's a different category of problem.\n\nAt $1.25 billion, someone signed off on due diligence. It would be worth knowing what it said.","[\"batteries\",\"startups\",\"hardware\",\"deep-tech\"]","2026-06-09T12:26:43.000Z","2026-06-09T14:36:23.693Z","2026-06-18T07:27:11.754Z","published",null,[],"https:\u002F\u002Fcdn.xyz.onl\u002Farticle-images\u002Fdonut-labs-solid-state-battery-claim-disproved-by-independent-testing.webp","startups",[27,25,28,29],"batteries","hardware","deep-tech",[31],{"name":32,"url":33},"Tom's Hardware","https:\u002F\u002Fwww.tomshardware.com\u002Ftech-industry\u002Fstartups-miracle-solid-state-battery-actually-uses-lithium-ion-chemistry-according-to-third-party-tests-donut-lab-raised-usd25m-and-is-valued-at-usd1-25b-on-what-now-appear-to-be-debunked-claims",0,{"sections":36},[37,42,47,52,57,61,66,71,76,81,85,90,95,100],{"name":38,"slug":39,"count":40,"latest_published_at":41},"AI","ai",2602,"2026-07-18T18:30:00.000Z",{"name":43,"slug":44,"count":45,"latest_published_at":46},"Security","security",315,"2026-07-17T19:30:00.000Z",{"name":48,"slug":49,"count":50,"latest_published_at":51},"Deals","deals",179,"2026-06-29T20:02:07.000Z",{"name":53,"slug":54,"count":55,"latest_published_at":56},"Policy","policy",169,"2026-07-17T19:49:53.000Z",{"name":58,"slug":28,"count":59,"latest_published_at":60},"Hardware",126,"2026-07-16T20:09:48.000Z",{"name":62,"slug":63,"count":64,"latest_published_at":65},"Consumer Tech","consumer-tech",94,"2026-07-16T16:29:46.000Z",{"name":67,"slug":68,"count":69,"latest_published_at":70},"Software","software",72,"2026-07-17T09:42:05.000Z",{"name":72,"slug":73,"count":74,"latest_published_at":75},"Science","science",66,"2026-07-10T10:29:37.000Z",{"name":77,"slug":78,"count":79,"latest_published_at":80},"Dev Tools","dev-tools",60,"2026-07-16T16:59:13.000Z",{"name":82,"slug":25,"count":83,"latest_published_at":84},"Startups",42,"2026-07-16T16:30:35.000Z",{"name":86,"slug":87,"count":88,"latest_published_at":89},"Gaming","gaming",41,"2026-07-09T04:00:00.000Z",{"name":91,"slug":92,"count":93,"latest_published_at":94},"General","general",29,"2026-07-10T22:28:58.000Z",{"name":96,"slug":97,"count":98,"latest_published_at":99},"Reviews","reviews",20,"2026-06-24T12:00:01.000Z",{"name":101,"slug":102,"count":103,"latest_published_at":104},"How-To","how-to",6,"2026-06-16T09:00:00.000Z"]