David Pogue, January 30, 2017

Batteries, as you may have figured out by now, have a problem. A few problems, actually.

They don’t hold nearly enough power. That’s a real problem for phones, smartwatches, and electric cars.

They’re very expensive. That’s a real problem for the national electric grid, which desperately needs some kind of energy storage if sun and wind power are ever to become a thing.

And above all, they’re explosive. That’s a real problem for Samsung—and, actually, anyone who would rather not carry an envelope full of fire next to their thighs.

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