The molten-liquid #battery by @Ambri_Inc could go for 20 years while retaining 95 percent of its capacity, according to its inventor, MIT’s Donald Sadoway.

Ah I had a suspicion this article would be about Ambri! I applied to work there once while I was in undergrad (didn’t get the job). Very cool tech, glad to hear that their work is coming to fruition. Good grid-level energy storage will be an important enabling technology for wider adoption of renewables.

Two miracle batteries in one weekend? Nice.

That sounds really interesting, but the article doesn’t do anything to explain how it’s kept molten. How much energy do you need to put in to the battery environment to keep it functioning? If it loses power, how long can it keep itself going until it turns into a solid block of metal?