The school writes that this new fuel cell is the first in the world to combine porous stainless steel with thin-film electrolyte and electrodes that are "of minimal heat capacity." The result? Both performance and durability (lithium-ion's biggest weak spots as time goes on) leaped pretty dramatically. And in terms of real-world changes, Pohang's scientists say this leads to a drone that can fly for over an hour and smartphones that only require a charge once a week. Good bye battery anxiety, hello devices with much better longevity.