Why the future of the power grid depends on giant batteries

Say “battery,” and most people think of the device that powers our phones, our laptops, and — maybe if they’re being ambitious — our electric vehicles. But it’s time to think bigger: At their core, batteries are simply a way to store energy, and with some creativity, they’re capable of powering electric vehicles, houses, and entire cities.There’s the Tesla batteries acting as backup for a wind farm in Australia. There’s PG&E building the