电池是怎样工作的 How batteries work

You probably know the feeling.

Your phone utters its final plaintive " bleep"

and cuts out in the middle of your call.

In that moment, you may feel more like throwing your battery across the room

than singing its praises,

but batteries are a triumph of science.

They allow smartphones and other technologies to exist

without anchoring us to an infernal tangle of power cables.

Yet even the best batteries will diminish daily,

slowly losing capacity until they finally die.