Solid-state batteries have a lot of promise. Unlike current lithium-ion batteries, solid-state ones don't contain flamma…

Solid-state batteries have a lot of promise. Unlike current lithium-ion batteries, solid-state ones don't contain flammable liquids, which are a major drawback as illustrated by stories of laptops and electric cars bursting into flames. Solid-state batteries are also less toxic, have higher energy densities, charge faster, and survive more recharge cycles without degenerating.