Third-party test results have put Donut Lab's much-discussed battery cell back on people's radar, though the more notable development may be how subdued the response has been.
In a video posted to Reddit's r/batteries forum, Marko Lehtimäki, co-founder and CEO of battery-maker Donut Lab, introduced several innovations in the company's solid-state batteries.
(Click here to watch the embedded video if it doesn't appear.)
However, Reddit users in the thread focused more on the lack of attention the Donut Lab video had generated compared to previous announcements.
Here's what to know
Even the Redditor who shared the video noted that they had done so due to the lack of attention it had generated so far.
"I searched on Reddit and no one is talking about this, even though it's been posted two hours ago," the original poster wrote.
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For some commenters, the long delay since the company's previous announcement seemed to explain the indifference.
"They waited so long they lost the hype factor," said one person.
More background
The biggest revelation in the video is intended to be Donut Lab's purported advancements in energy density, with the company pushing to store more electricity in ever smaller and lighter packages.
Such advancements in battery technology are extremely important in the transition to a more electrified, less fossil-fuel-dependent world.
Better cells can help households store solar power, keep essential devices running during outages, and reduce the cost and size of backup systems. For municipalities and businesses, stronger battery performance can support grid resilience and cut wasted energy.
At the same time, early-stage battery claims have a long history of getting ahead of real-world products. A third-party test, like the one touted in the Donut Lab video, represents an important milestone, but it is not the same as achieving large-scale manufacturing or long-term reliability.
This gap between technological advancement and consumer products that people can actually purchase and use sits at the center of the Reddit thread.
Several commenters argued that the way the video presented the battery technology may promise more than the chemistry warrants.
"It wouldn't be the first time Marko's been caught stretching the truth past the breaking point," said one commenter.
What can be done?
While eye-catching battery headlines can generate excitement and indicate potential paths for future advancements, it is important to remember that they are only early signals of what might come.
Independent testing, clear safety information, warranty details, and evidence that a product can be manufactured at scale offer a stronger basis for judging whether a new cell could lower energy bills or improve blackout preparedness than mere promotional videos.
While increased scrutiny and independent testing of a company's claims can help slow the hype cycle, they also increase the odds that products reaching the market are safer, more affordable, and genuinely useful when the power goes out.
The thread also illustrates potential pitfalls for battery startups that make big promises but risk underdelivering.
As one commenter put it, "This entire video sounds like he is making excuses... I am beginning to wonder if it's all just vaporware?"
Where can I learn more?
If you're sizing up battery breakthroughs, the same questions keep coming up: how they perform, how safe they are, and whether the stated results hold up outside the lab.
• Automakers say many EV packs still have 90% of their original range after years on the road.
• Scientists have built a game-changing safety feature into lithium batteries that could reshape EV design.
• Engineers see substantial promise in solid-state batteries for safer, lighter EVs.
• In South Korea, researchers found a method that could dramatically shift lithium-metal battery performance.
• Researchers have said a futuristic zinc-ion cell goes against the conventional thinking on fast charging.
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