{"id":350306,"date":"2026-03-23T15:03:28","date_gmt":"2026-03-23T15:03:28","guid":{"rendered":"https:\/\/www.evearly.news\/en\/donut-lab-solid-state-battery-5-independent-tests-in-still-no-energy-density-or-cycle-life-data\/"},"modified":"2026-03-23T18:24:28","modified_gmt":"2026-03-23T18:24:28","slug":"donut-lab-solid-state-battery-5-independent-tests-in-still-no-energy-density-or-cycle-life-data","status":"publish","type":"post","link":"https:\/\/www.evearly.news\/en\/donut-lab-solid-state-battery-5-independent-tests-in-still-no-energy-density-or-cycle-life-data\/","title":{"rendered":"Donut Lab solid-state battery: 5 independent tests in, still no energy density or cycle life data"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/electrek.co\/wp-content\/uploads\/sites\/3\/2026\/02\/donut_2x1.png?w=1600\" alt=\"On today's extraordinary episode of Quick Charge, we reflect on the fact that extraordinary claims require extraordinary evidence, and both Donut Labs AND Tesla are a long way from turning everyone into believers.\" \/>Donut Lab has now released five independent test reports from Finland\u2019s VTT Technical Research Centre on its solid-state battery \u2014 and not a single one addresses the two claims that actually matter: the 400 Wh\/kg energy density and the 100,000-cycle life. <a href=\"https:\/\/electrek.co\/2026\/03\/23\/donut-lab-solid-state-battery-5-tests-no-energy-density-cycle-life\/\" target=\"blank\">Read more&#8230;<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>&#8230; <a class=\"continue-reading-link\" href=\"https:\/\/www.evearly.news\/en\/donut-lab-solid-state-battery-5-independent-tests-in-still-no-energy-density-or-cycle-life-data\/\"><\/a><\/p>\n","protected":false},"author":20,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"Default","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-350306","post","type-post","status-publish","format-standard","hentry","category-electrek"],"_links":{"self":[{"href":"https:\/\/www.evearly.news\/en\/wp-json\/wp\/v2\/posts\/350306","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.evearly.news\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.evearly.news\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.evearly.news\/en\/wp-json\/wp\/v2\/users\/20"}],"replies":[{"embeddable":true,"href":"https:\/\/www.evearly.news\/en\/wp-json\/wp\/v2\/comments?post=350306"}],"version-history":[{"count":1,"href":"https:\/\/www.evearly.news\/en\/wp-json\/wp\/v2\/posts\/350306\/revisions"}],"predecessor-version":[{"id":350335,"href":"https:\/\/www.evearly.news\/en\/wp-json\/wp\/v2\/posts\/350306\/revisions\/350335"}],"wp:attachment":[{"href":"https:\/\/www.evearly.news\/en\/wp-json\/wp\/v2\/media?parent=350306"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.evearly.news\/en\/wp-json\/wp\/v2\/categories?post=350306"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.evearly.news\/en\/wp-json\/wp\/v2\/tags?post=350306"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}