Donut Lab’s solid-state battery hits 80% charge in 4.5 minutes

Donut Lab commissioned VTT to validate its bold solid-state claims, and the results show near-full capacity retention even after ultra-fast charging...

VTT Technical Research Centre ran the tests in what engineers described as a worst-case scenario.

The lab did not use active temperature controls. It also let the cell’s heat rise freely at high charging rates.

Experts measured performance using C-rates, where 1C equals a one-hour charge from empty to full.

Under that scale, 5C roughly equals a 12-minute charge, and 11C is about a five- to six-minute charge.

The process began with a standard discharge test at 1C. Rapid charging followed at 5C and 11C under both cooling configurations.

At 5C, the battery held up well, reaching 80% state of charge in about 9.5 minutes and 100% in just over 12 minutes.

After discharge, the cell retained all its stored energy. These results align with the five-minute charge claim the company previously announced.

Donut Lab then pushed the cell to even higher charging rates. At an 11C rate, the battery reached 80% charge in 4.5 minutes. It hit full capacity in just over seven minutes.

When discharged after this rapid charge, the cell retained between 98.4% and 99.6% of the energy it had stored.

These figures show the battery’s ability to handle intense power input without huge losses.

Unlike many solid-state concepts being developed in labs, Donut Lab’s design performed these tests without requiring active cooling systems.

It also did not need unusual pressure or compressive force on the cell to work effectively.

Nah I will just wait a year to see if they IPO or not if they do I’ll by 20 grand or so even a total loss is a tax write off for me and I work it into a win either way that’s the beauty of the American corporate tax code.

I fully expect them to sell the IP to a big boy like BYD who would use it to crush their arch nemesis CATL or vice versa. Here again it’s when not if these types of cells come to market every major player is at some phase in testing or preproduction in 2026. The whole reason they gave full access to a independent third party was to shut up people just like you. So in a sense they already won that argument the data is right there they will be releasing more later this week on a third party venue as well. These are Finnish remember they made Nokia before the world got smart phone fever some really smart Finnish people. These guys just beat the industry by less than a year or so. Toyota has a working lab grade device so does Benz. It’s when not if at this point. The big competition is sodium ion from CATL at soon to be $20 per kWh and 200wh/kg with -40C and 10000+ cycle life available today at gigawatts level production. Only tech like this with very fast charging for niche markers can even hope to compete with what CATL already has. BYD had to.drop their LFP prices to match CATL and up the cycle life to 10000 by using more cathode materials.

You do you boo boo, I hope they IPO and make a lot of people money. They don’t have the manufacturing scale they should sell the IP and hit the beach.

Okay, thank you for the additional information. I now know more than I would have known otherwise, as batteries, and electric cars are not of much interest to me. I wil never own an electric car, because I no longer am in the car buying markeplacet since of my failing eyesight prevents me from driving. I aklso doubt that I would ever feel comfortable in a vehicle that drove itself either. 😁👍

I retired at 42 at this point I only do what interests me. To keep my mind sharp and not waste 12+ years of university. I wouldn’t blink at a 50k IPO gamble on a first mover with independent verification that is how science is done.

Again be miserable this century is shaping up to be great. Can’t wait for an Ebike that does what a 1000cc does today without the shifting and torque off the line that is truly scary. We are close only the range is lacking , double the density to 400wh vs 220 and now you have a superbike with 200 miles of range at 100+ mph.

And by Ebike I mean a electric motorcycle on crouch rocket frame with 200hp like GSXR or Ninja and a 180mph.top speed like my R1 Yamaha. Solid state cells make this possible

This 200+ mph monster with range to do the Dallas Austin run with no stops is what.400wh/kg does flat out don’t care if It’s China who makes the batteries they have the engineers and the supply chain.

https://lightningmotorcycle.com/ls-218/
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