NASA's Moon Batteries Work at Minus 112°F

If your car battery dies on a freezing morning, imagine trying to start a rover at minus 328 degrees Fahrenheit on the Moon's South Pole.

NASA researchers just cracked this problem with batteries that work in extreme temperatures where traditional ones would fail instantly. The SPEARS project replaces the liquid inside standard batteries with solid ceramic or polymer materials that won't freeze, evaporate, or catch fire in space.

During testing at NASA's Langley Research Center in Virginia, the small prototype cells performed well down to minus 112 degrees Fahrenheit. That's a game changer for the Artemis program, which aims to establish a sustained human presence on the Moon.

"We proved for the first time that these cells can work down to minus 80 degrees Celsius," said Yi Lin, the testing lead at NASA Langley. He's confident the team can push that range even further in coming years.

The real magic happens when temperatures swing wildly between lunar day and night. Traditional lithium-ion batteries like those in your phone would crack under the stress, but SPEARS batteries survived exposure from 212 degrees Fahrenheit down to minus 274 degrees without damage.

The solid electrolyte doesn't freeze like liquid does, so the batteries just need a small heater to warm up and start working again. This means spacecraft and lunar habitats won't need heavy heating systems running constantly, making missions lighter, cheaper, and longer.

The Ripple Effect

What starts on the Moon rarely stays there. The same technology could revolutionize batteries on Earth for electric cars, drones, and communication devices in extreme climates.

NASA can customize the chemistry for different jobs, tuning batteries for maximum energy, power, or durability depending on whether they're powering a drill in a shadowed crater or keeping scientific instruments running through the lunar night. "Just like the chemistry in your earbuds is different from the chemistry in your phone, which is different from the chemistry in your car, all these chemistries can still function with a solid electrolyte," Lin explained.

The project evolved from earlier NASA work on aviation batteries and has already attracted interest for commercial partnerships. From the Arctic to space stations, anywhere humans need reliable power in harsh conditions could benefit.

When astronauts return to the Moon, these batteries will be there to keep them safe and powered up.