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ARPA-E says better sensors and controls could allow automakers to cut battery size by 20 to 50 percent.
New energy-storage technology could surpass today’s batteries in capacity and durability.
A battery-swapping startup’s innovative system for charging electric vehicles suffered from overreach and limited consumer demand.
Rechargeable zinc-air batteries can store three times the energy of a lithium-ion battery.
Lithium-sulfide batteries could store far more energy than lithium-ion ones.