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A device for power tools may also help regenerative braking.
A 19th-century idea might lead to cleaner cars, larger-scale renewable energy.
Sun Catalytix is making a new type of flow battery that could store hours’ worth of energy on the grid.
Digital quantum batteries could exceed lithium-ion performance by orders of magnitude.
The government’s energy research agency is spending $30 million to demonstrate cheap solar power that’s available day and night.
Eos Energy Storage says its zinc-air battery can store energy to meet peak power needs for less.
A Pittsburgh company says its battery has the long life and cheap cost needed to be practical for energy storage.
Magnetic-field energy storage could have unique advantages, but scaling up will be a challenge.